!what do you learn about that particular topic?
I learn that the The bending of light that occurs when light passes from one transparent material to another is called refraction of light.light bends because its speed hanges as it moves from one transparent material to another.
light travels slower in more dense materials than in less dense materials.therefore light travels slower in glass than in air.
and i know many effects of refraction of light.such as we can use refraction of light to made the words appear to be nearer to the surface of the glass than they actually are.
From:textbook resource!
summarise the key points of that topic.
Refraction is the bending of light that takes place at a boundary between two materials having different indices of refraction.
Refraction is due to a change in the speed of light as it passes from one medium to another. The change in direction of the ray (represented by the heavy line in each diagram) is what is meant by the term refraction, which just means ¡°bending¡± or ¡°breaking.¡±
From:http://mintaka.sdsu.edu/GF/explain/optics/refr.html!
anything interesting to add?I
n 1621, a Dutch physicist named Willebrord Snell (1591-1626), derived the relationship between the different angles of light as it passes from one transperent medium to another.
When light passes from one transparent medium to another, it bends according to Snell's law which states:Ni * Sin(Ai) = Nr * Sin(Ar),
where:Ni is the refractive index of the medium the light is leaving,Ai is the incident angle between the light ray and the normal to the meduim to medium interface,Nr is the refractive index of the medium the light is entering,Ar is the refractive angle between the light ray and the normal to the meduim to medium interface.
From:http://www.ps.missouri.edu/rickspage/refract/refraction.html
Showing posts with label refraction. Show all posts
Showing posts with label refraction. Show all posts
Friday, June 20, 2008
Refraction of Light by 2E2 Tan Chew Mei
i.What is refraction of light ?
Refraction is the change in direction of a wave due to a change in its speed. This is most commonly seen when a wave passes from one medium to another. Refraction of light is the most commonly seen example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another or when water waves move into water of a different depth. Refraction is also described by Snell’s Law.
ii.When does it happen? How will light bend ?
In optics, refraction occurs when light waves travel from a medium with a given refractive index to a medium with another. At the boundary between the media, the wave's phase velocity is altered, it changes direction, and its wave length increases or decreases but its frequency remains constant. For example, a light ray will refract as it enters and leaves glass; understanding of this concept led to the invention of lenses and the refracting telescope.
iii. What is refractive index ?
Refraction can be seen when looking into a bowl of water. Air has a refractive index of about 1.0003, and water has a refractive index of about 1.33.
Iv. Effect of refraction ?
refraction can make objects appear closer than they are, it is responsible for allowing water to magnify objects. First, as light is entering a drop of water, it slows down. If the water's surface is not flat, then the light will be bent into a new path. This round shape will bend the light outwards and as it spreads out, the image you see gets larger.
Refraction is the change in direction of a wave due to a change in its speed. This is most commonly seen when a wave passes from one medium to another. Refraction of light is the most commonly seen example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another or when water waves move into water of a different depth. Refraction is also described by Snell’s Law.
ii.When does it happen? How will light bend ?
In optics, refraction occurs when light waves travel from a medium with a given refractive index to a medium with another. At the boundary between the media, the wave's phase velocity is altered, it changes direction, and its wave length increases or decreases but its frequency remains constant. For example, a light ray will refract as it enters and leaves glass; understanding of this concept led to the invention of lenses and the refracting telescope.
iii. What is refractive index ?
Refraction can be seen when looking into a bowl of water. Air has a refractive index of about 1.0003, and water has a refractive index of about 1.33.
Iv. Effect of refraction ?
refraction can make objects appear closer than they are, it is responsible for allowing water to magnify objects. First, as light is entering a drop of water, it slows down. If the water's surface is not flat, then the light will be bent into a new path. This round shape will bend the light outwards and as it spreads out, the image you see gets larger.
Refraction of Light by 2E1 The Su Zin
After doing research about this topic, I have learnt more concerning with the topic: refraction such as its laws and rules and also about refractive index.
1)Refraction
Refraction refers to the change in direction of light when it moves from one transparent medium into another transparent material which causes it to travel at a different speed.
Light slows down
Visible light is electromagnetic radiation or waveform. The speed or velocity of light in a vacuum is about 186,000 miles per second or 300,000 kilometres per second. The velocity of light or other electromagnetic radiation is typically slower when it passes through a transparent material. For example, the speed of light in water is about 140,000 mi/sec or 226,000 km/sec.
2)Refraction Rules When visible light passes through a transparent material such as glass and water, its velocity(speed) changes according to the index of refraction of the material. The index of refraction of air is about 1.00 and that of water is 1.33. When the beam of light enters water at an angle, it is bent or refracted as a result of the decrease in velocity.
Light is refracted inward when entering medium of higher index of refraction
Light is refracted outward when entering medium of lower index of refraction
The bending occurs because light travels more slowly in a denser medium.
Why does the light beam bend?
Considering a group of soldiers marching into a muddy field at an angle to their direction of travel can explain how a beam of light will be refracted. As the soldiers try to stay in a line, the direction of travel would bend because marching in mud would slow them down, starting with the first group to enter the field. Then, as they leave the muddy area, they go to their original speed, thus bending the direction of travel again. The original direction and the final direction are parallel but displaced.
The same thing happens when a beam of light enters a transparent material at an angle.
Example of how light is refracted when passes through different medium.
3 )INDEX OF REFRACTION
Refractive index is a number which indicates the power of refraction of a given medium relative to a previous medium. The absolute refractive index of a medium is the speed of light in a vacuum (air) divided by the speed of light in that medium.
Symbol is “n”. The larger the index ,the smaller the speed of light.
n = c/v
4)THE EFFECTS OF REFRACTION
Refraction has some unusual effects in everyday life.
-When a submerged object is viewed from above the surface of water, it appears closer to the surface than it is. This is due to light rays from the object being bent away from the normal as they pass out of the water (the more dense medium) into air (the less dense medium).
-The ratio of the real depth of the object to its apparent depth equals the refractive index of water.
Here are some examples of the EFFECTS:
eg1 - Apparent Depth in Water
In the above diagram, the chest seems to be nearer to the surface, but it is not. Refraction causes the chest to appear nearer to the surface than it actually is when it is in transparent material, water .
When you look at something under the water, not only the position of the object is not located at the place you though it was. The shape of the object is also changed. Location of the image and its shape are all depend on the location you view it.
eg2- In this diagram, the straw seems bent in the glass.
Refraction causes point X to appear nearer to the surface at Y so we see that that the straw appears to bend nearer to the surface of the water. This is one of the effect of refraction.
Eg.3 Pencil in water glass
You can also see this effect by putting a pencil in a glass of water. It appears as if the pencil is broken, but it is just because of the refraction of light.
The light from the pencil is refracted as it passes from the water to the glass to air, causing it to be displaced. Since the surface of the glass is curved, the water in the glass also acts as a magnifying glass, slightly enlarging the pencil.
So here is the link for mini short quiz, very simple quiz. =)
http://www.school-for-champions.com/science/light_refraction.htm#Mini-quiz
Acknowledgement
1 . http://sol.sci.uop.edu/~jfalward/refraction/refraction.html
2.http://sg.answers.yahoo.com/question/index;_ylt=ApfjYqHaykzhEnCDtDjBpjYh4wt.;_ylv=3?qid=20070902013243AA3gdvF
3. http://www.school-for-champions.com/science/light_refraction.htm
http://www.phy.ntnu.edu.tw/ntnujava/
4. The Usborne Illustrated Dictionary Of Physics
1)Refraction
Refraction refers to the change in direction of light when it moves from one transparent medium into another transparent material which causes it to travel at a different speed.
Light slows down
Visible light is electromagnetic radiation or waveform. The speed or velocity of light in a vacuum is about 186,000 miles per second or 300,000 kilometres per second. The velocity of light or other electromagnetic radiation is typically slower when it passes through a transparent material. For example, the speed of light in water is about 140,000 mi/sec or 226,000 km/sec.
2)Refraction Rules When visible light passes through a transparent material such as glass and water, its velocity(speed) changes according to the index of refraction of the material. The index of refraction of air is about 1.00 and that of water is 1.33. When the beam of light enters water at an angle, it is bent or refracted as a result of the decrease in velocity.
Light is refracted inward when entering medium of higher index of refraction
Light is refracted outward when entering medium of lower index of refraction
The bending occurs because light travels more slowly in a denser medium.
Why does the light beam bend?
Considering a group of soldiers marching into a muddy field at an angle to their direction of travel can explain how a beam of light will be refracted. As the soldiers try to stay in a line, the direction of travel would bend because marching in mud would slow them down, starting with the first group to enter the field. Then, as they leave the muddy area, they go to their original speed, thus bending the direction of travel again. The original direction and the final direction are parallel but displaced.
The same thing happens when a beam of light enters a transparent material at an angle.
Example of how light is refracted when passes through different medium.
3 )INDEX OF REFRACTION
Refractive index is a number which indicates the power of refraction of a given medium relative to a previous medium. The absolute refractive index of a medium is the speed of light in a vacuum (air) divided by the speed of light in that medium.
Symbol is “n”. The larger the index ,the smaller the speed of light.
n = c/v
4)THE EFFECTS OF REFRACTION
Refraction has some unusual effects in everyday life.
-When a submerged object is viewed from above the surface of water, it appears closer to the surface than it is. This is due to light rays from the object being bent away from the normal as they pass out of the water (the more dense medium) into air (the less dense medium).
-The ratio of the real depth of the object to its apparent depth equals the refractive index of water.
Here are some examples of the EFFECTS:
eg1 - Apparent Depth in Water
In the above diagram, the chest seems to be nearer to the surface, but it is not. Refraction causes the chest to appear nearer to the surface than it actually is when it is in transparent material, water .
When you look at something under the water, not only the position of the object is not located at the place you though it was. The shape of the object is also changed. Location of the image and its shape are all depend on the location you view it.
eg2- In this diagram, the straw seems bent in the glass.
Refraction causes point X to appear nearer to the surface at Y so we see that that the straw appears to bend nearer to the surface of the water. This is one of the effect of refraction.
Eg.3 Pencil in water glass
You can also see this effect by putting a pencil in a glass of water. It appears as if the pencil is broken, but it is just because of the refraction of light.
The light from the pencil is refracted as it passes from the water to the glass to air, causing it to be displaced. Since the surface of the glass is curved, the water in the glass also acts as a magnifying glass, slightly enlarging the pencil.
So here is the link for mini short quiz, very simple quiz. =)
http://www.school-for-champions.com/science/light_refraction.htm#Mini-quiz
Acknowledgement
1 . http://sol.sci.uop.edu/~jfalward/refraction/refraction.html
2.http://sg.answers.yahoo.com/question/index;_ylt=ApfjYqHaykzhEnCDtDjBpjYh4wt.;_ylv=3?qid=20070902013243AA3gdvF
3. http://www.school-for-champions.com/science/light_refraction.htm
http://www.phy.ntnu.edu.tw/ntnujava/
4. The Usborne Illustrated Dictionary Of Physics
Refraction of Light by 2E1 Shahir
For thousands of years, people have noticed that a straight stick placed obliquely in water appears to be broken at an angle where it enters the water. This is the origin of the term "refraction," which means literally "broken back."
Refraction is the change of light that changes direction when it passes from one medium to another.
refraction occurs when light waves travel from a medium with a given refractive index to a medium with another.
At the boundary between the media, the wave's phase velocity is altered, it changes direction, and its wavelength increases or decreases but its frequency remains constant.
For example, a light ray will refract as it enters and leaves glass.the understanding of this concept led to the invention of lenses and the refracting telescope
from a less dense material to a denser material, light will slows down and refracted towards the normal, while from denser material into a less dense material, light speeds up and is refracted away from the normal.
The refractive index of a transparent optical medium, also called the index of refraction, is the factor by which the phase velocity is decreased relative to the velocity of light in vacuum, assuming linear propagation
effects of refraction are : -it causes an object to be nearer than it actually is when a transparent material is on top - a stick will appear to be bent inside a bearker filled with water.
From this topic, i have learned that refraction happens in our everyday life. It causes effects that are very unusual and refraction is an interesting topic to learn.
key points : -refraction happens when light changes direction when it passes from one medium to another -it causes effects that are unusual.
Refraction is the change of light that changes direction when it passes from one medium to another.
refraction occurs when light waves travel from a medium with a given refractive index to a medium with another.
At the boundary between the media, the wave's phase velocity is altered, it changes direction, and its wavelength increases or decreases but its frequency remains constant.
For example, a light ray will refract as it enters and leaves glass.the understanding of this concept led to the invention of lenses and the refracting telescope
from a less dense material to a denser material, light will slows down and refracted towards the normal, while from denser material into a less dense material, light speeds up and is refracted away from the normal.
The refractive index of a transparent optical medium, also called the index of refraction, is the factor by which the phase velocity is decreased relative to the velocity of light in vacuum, assuming linear propagation
effects of refraction are : -it causes an object to be nearer than it actually is when a transparent material is on top - a stick will appear to be bent inside a bearker filled with water.
From this topic, i have learned that refraction happens in our everyday life. It causes effects that are very unusual and refraction is an interesting topic to learn.
key points : -refraction happens when light changes direction when it passes from one medium to another -it causes effects that are unusual.
Refraction of Light by 2E1 Fatima
What is refraction?
Refraction is the bending of a light when it passes from one transparent medium into another.
When and how does it happen?
Light changes direction because light travels at different speeds in different substances, causing it to be bent when it changes from one substance to another.
The degree of refraction depends in part on the angle at which the light hits the surface of a material. A line perpendicular to that surface is called the normal. The angle between the incoming light ray and the normal to the surface is called the angle of incidence. The angle between the refracted ray and the normal is called the angle of refraction. The angle of refraction cannot exceed 90°.
A ray of light refracts or deviates from its original path as it passes from one optical medium to another because the speed of light changes.
Refractive Index?
The amount of refraction can be found using the refractive index.
The speed at which light travels may change as it passes from one medium to another. Different substances will cause different changes to the speed of light. For example, glass slows light more than water.
To find the effect of a substance we can calculate its refractive index. This is a ratio of the speed of light in air or vacuum and the speed of light in the substance.
refractive index = speed of light in air/speed of light in substance
For example, the speed of light in air is 300,000 km/s and in glass it travels at about 200,000 km/s. Its refractive index is therefore 1.5. Water, however, has a refractive index of 1.33. This means that light rays are refracted more when they enter glass than when they enter water.
Effects of Refraction?
The effects of refraction:
1. Make things appear to be nearer
2. make objects in water appear to be bent
the pencil appears to be bent because of refraction
DK Reference Encyclopedia
http://www.tutorvista.com/content/physics/physics-ii/light-refraction/refraction-light.php
http://images.google.com.sg/
Refraction is the bending of a light when it passes from one transparent medium into another.
When and how does it happen?
Light changes direction because light travels at different speeds in different substances, causing it to be bent when it changes from one substance to another.
The degree of refraction depends in part on the angle at which the light hits the surface of a material. A line perpendicular to that surface is called the normal. The angle between the incoming light ray and the normal to the surface is called the angle of incidence. The angle between the refracted ray and the normal is called the angle of refraction. The angle of refraction cannot exceed 90°.
A ray of light refracts or deviates from its original path as it passes from one optical medium to another because the speed of light changes.
Refractive Index?
The amount of refraction can be found using the refractive index.
The speed at which light travels may change as it passes from one medium to another. Different substances will cause different changes to the speed of light. For example, glass slows light more than water.
To find the effect of a substance we can calculate its refractive index. This is a ratio of the speed of light in air or vacuum and the speed of light in the substance.
refractive index = speed of light in air/speed of light in substance
For example, the speed of light in air is 300,000 km/s and in glass it travels at about 200,000 km/s. Its refractive index is therefore 1.5. Water, however, has a refractive index of 1.33. This means that light rays are refracted more when they enter glass than when they enter water.
Effects of Refraction?
The effects of refraction:
1. Make things appear to be nearer
2. make objects in water appear to be bent
the pencil appears to be bent because of refraction
DK Reference Encyclopedia
http://www.tutorvista.com/content/physics/physics-ii/light-refraction/refraction-light.php
http://images.google.com.sg/
Refraction of Light by 2E1 Emily
REFRACTION.
If you have ever half submerged a straight stick into water, you have probably noticed that the stick appears bent at the point it enters the water.This optical effect is due to refraction.
Refraction is the change in direction of a wave due to a change in its speed.
Refraction happens when light passes from one medium to another.
When light passes from one medium to another, light from less dense media to a denser media will slow down and it is refracted towards the normal. But when light passes from denser media to less dense media, it will speeds up and it is refracted from the normal.
REFRACTIVE INDEX
The refractive index of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium.
EFFECTS OF REFRACTION
refraction has some unusual effects in everyday life. some examples are :
- when you place a glass block on top of your textbook, and observe. The words will appear to be nearer to the surface of the glass than they actually are.
- the object appears to be at a higher position than it actually is. for this reason, a swimming pool appears shallower than it really is.
- a pencil inside a beaker filled with water will appear to be bent.
From all the information i have gained, i have learnt that refraction occurs in everyday life. It is very interesting to know how it happens and what are the unusual effects caused by refraction.
The Key point of this topic is : Refraction happens when light changes direction when it passes from one transparent material into another. Refraction will cause an object appears to be at higher position than it actually is.
Science Textbook Chapter 8, Refraction. http://www.ps.missouri.edu/rickspage/refract/refraction.html http://en.wikipedia.org/wiki/Refraction
If you have ever half submerged a straight stick into water, you have probably noticed that the stick appears bent at the point it enters the water.This optical effect is due to refraction.
Refraction is the change in direction of a wave due to a change in its speed.
Refraction happens when light passes from one medium to another.
When light passes from one medium to another, light from less dense media to a denser media will slow down and it is refracted towards the normal. But when light passes from denser media to less dense media, it will speeds up and it is refracted from the normal.
REFRACTIVE INDEX
The refractive index of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium.
EFFECTS OF REFRACTION
refraction has some unusual effects in everyday life. some examples are :
- when you place a glass block on top of your textbook, and observe. The words will appear to be nearer to the surface of the glass than they actually are.
- the object appears to be at a higher position than it actually is. for this reason, a swimming pool appears shallower than it really is.
- a pencil inside a beaker filled with water will appear to be bent.
From all the information i have gained, i have learnt that refraction occurs in everyday life. It is very interesting to know how it happens and what are the unusual effects caused by refraction.
The Key point of this topic is : Refraction happens when light changes direction when it passes from one transparent material into another. Refraction will cause an object appears to be at higher position than it actually is.
Science Textbook Chapter 8, Refraction. http://www.ps.missouri.edu/rickspage/refract/refraction.html http://en.wikipedia.org/wiki/Refraction
Refraction of Light by 2E1 Lee Jae Woong
Refraction
Through our project, I have learnt about refraction and its uses. Refraction refers to the bending of light as it passes between materials of different optical density.
In refraction, I learnt that the denser the material is, the slower the speed of light will be in that material. Refraction will happen when light passes from one medium to another medium with different densities.
For example, when light passes from air to a transparent glass block, the speed of light will slow down and it will cause the light ay to bend closer to the normal.
As seen in diagram 1, the light ray passes from air to a transparent glass block. The light ray, as shown, is bent towards the normal. This indicates that the speed of light is reduced when passing from one medium to another. The denser the medium is, the light ray will bend closer towards the normal. Similarly, when the light ray moves from glass block to air it is refracted away from the normal
Refractive Index
The refractive index of a medium is the measurement of how much the speed of light has reduced or increased inside various types of medium. Generally, the refractive index is subject to changes based on the incidence of the light. This explains why different colours of light travel at different speeds. The higher the index, the slower the speed of light will be through the medium.
Formula for refractive Index is n= sin i / sin r
Effects of Refraction
Effects of refraction can be seen in our everyday lives.
Firstly, refraction causes objects to appear closer than it actually is. For example, in a swimming pool, the pool looks shallower than it actually is. This is because our brains think the light has moved in a straight line. Therefore the swimming pool seems shallower than it usually is. Another example, is when we place our hand below a glass block, our hand seems nearer to the surface than it is. Thus the glass block seems thinner than the actual thickness.
As seen in diagram 2 the pool seems to be of equal depth and it looks shallow. However it is actually deeper than it looks. Due to refraction, swimming pools or ponds always appear to be shallower than they really are. When approaching air from water, the waves speed up and as a result they refract away from the normal.
Diverging rays enter the eye and the brain traces these rays back to where it thinks an image is. This results in a virtual image at a shallower depth than is the actual case.
References
1. Refraction of Light by Rick Reed http://www.ps.missouri.edu/rickspage/refract/refraction.html
2. Explore your world with Science Discovery 2 Textbook
3. Answers.Com http://www.answers.com/topic/refractive-index?cat=technology
4. http://www.asiatravel.com/turkey/istanbul/marinprincesskumburgaz/gifs/pool2.jpg
5. http://pachome2.pacific.net.sg/~ezzychan/refraction.htm
Through our project, I have learnt about refraction and its uses. Refraction refers to the bending of light as it passes between materials of different optical density.
In refraction, I learnt that the denser the material is, the slower the speed of light will be in that material. Refraction will happen when light passes from one medium to another medium with different densities.
For example, when light passes from air to a transparent glass block, the speed of light will slow down and it will cause the light ay to bend closer to the normal.
As seen in diagram 1, the light ray passes from air to a transparent glass block. The light ray, as shown, is bent towards the normal. This indicates that the speed of light is reduced when passing from one medium to another. The denser the medium is, the light ray will bend closer towards the normal. Similarly, when the light ray moves from glass block to air it is refracted away from the normal
Refractive Index
The refractive index of a medium is the measurement of how much the speed of light has reduced or increased inside various types of medium. Generally, the refractive index is subject to changes based on the incidence of the light. This explains why different colours of light travel at different speeds. The higher the index, the slower the speed of light will be through the medium.
Formula for refractive Index is n= sin i / sin r
Effects of Refraction
Effects of refraction can be seen in our everyday lives.
Firstly, refraction causes objects to appear closer than it actually is. For example, in a swimming pool, the pool looks shallower than it actually is. This is because our brains think the light has moved in a straight line. Therefore the swimming pool seems shallower than it usually is. Another example, is when we place our hand below a glass block, our hand seems nearer to the surface than it is. Thus the glass block seems thinner than the actual thickness.
As seen in diagram 2 the pool seems to be of equal depth and it looks shallow. However it is actually deeper than it looks. Due to refraction, swimming pools or ponds always appear to be shallower than they really are. When approaching air from water, the waves speed up and as a result they refract away from the normal.
Diverging rays enter the eye and the brain traces these rays back to where it thinks an image is. This results in a virtual image at a shallower depth than is the actual case.
References
1. Refraction of Light by Rick Reed http://www.ps.missouri.edu/rickspage/refract/refraction.html
2. Explore your world with Science Discovery 2 Textbook
3. Answers.Com http://www.answers.com/topic/refractive-index?cat=technology
4. http://www.asiatravel.com/turkey/istanbul/marinprincesskumburgaz/gifs/pool2.jpg
5. http://pachome2.pacific.net.sg/~ezzychan/refraction.htm
Refraction of Light by 2E1 Jeong Seok Young
In this physics holiday homework about refraction I have learnt that refraction is happening around us everyday. Example we go to our swimming pool or a bath tub and see the floors of these things are actually closer to us then it actually is.
It is also useful as we could look into fish tanks and see the fishes closer to us giving us a better view. REFER TO PICTURE BELOW
But there are disadvantages like changing the direction of the light and speed of light in different substances.
Now Im going to summarise the key points of the topic REFRACTION
-What is refraction of light?
Refraction is the bending of a wave when it enters a medium where it's speed is different.
-When does it happen? how and when will the light bend?
Refraction happens when light waves travel from a medium with a given refractive index to a medium with another. Light travels inward when entering medium of higher index of refraction.
In the other hand,light travels outward when entering medium of lower index of refraction.
-What is refractive index?
The refractive index also called index of refraction,of a medium is a measure for how much the speed of light is reduced inside the medium.
Effects of refraction?
Effects of refraction happens everyday around us. for example when we see the floors of the swimming pool, it seems closer to us but its actually further away. And when there is a straw inside the cup it should be straight but we see it as bent.
-Anything intresting to add?
What is interesting about refraction is that the lights speed of refraction differs in all different types of substances.
It is also interesting that our eyes see things closer towards us when it is not.
REFRENCES
WEBSITES:
-http://hyperphysics.phy-astr.gsu.edu/Hbase/geoopt/refr.html
-http://www.ps.missouri.edu/rickspage/refract/refraction.html
-http://sol.sci.uop.edu/~jfalward/refraction/refraction.html
-http://micro.magnet.fsu.edu/primer/java/scienceopticsu/refraction/index.html
-http://www.fishnfriends.com/pix/showtank.jpg
ALL SEARCHINGS FROM GOOGLE.COM
It is also useful as we could look into fish tanks and see the fishes closer to us giving us a better view. REFER TO PICTURE BELOW
But there are disadvantages like changing the direction of the light and speed of light in different substances.
Now Im going to summarise the key points of the topic REFRACTION
-What is refraction of light?
Refraction is the bending of a wave when it enters a medium where it's speed is different.
-When does it happen? how and when will the light bend?
Refraction happens when light waves travel from a medium with a given refractive index to a medium with another. Light travels inward when entering medium of higher index of refraction.
In the other hand,light travels outward when entering medium of lower index of refraction.
-What is refractive index?
The refractive index also called index of refraction,of a medium is a measure for how much the speed of light is reduced inside the medium.
Effects of refraction?
Effects of refraction happens everyday around us. for example when we see the floors of the swimming pool, it seems closer to us but its actually further away. And when there is a straw inside the cup it should be straight but we see it as bent.
-Anything intresting to add?
What is interesting about refraction is that the lights speed of refraction differs in all different types of substances.
It is also interesting that our eyes see things closer towards us when it is not.
REFRENCES
WEBSITES:
-http://hyperphysics.phy-astr.gsu.edu/Hbase/geoopt/refr.html
-http://www.ps.missouri.edu/rickspage/refract/refraction.html
-http://sol.sci.uop.edu/~jfalward/refraction/refraction.html
-http://micro.magnet.fsu.edu/primer/java/scienceopticsu/refraction/index.html
-http://www.fishnfriends.com/pix/showtank.jpg
ALL SEARCHINGS FROM GOOGLE.COM
Refraction of Light by 2E4 Sudha
I learnt : when the light moves from air to glass,it is refracted towards the normal & when the light moves from glass to air,it is refracted away from the normal.
And also that light from an object bends as it comes out of water ; but our brain thinks the light has moved in a straight line. So, the object appears to be at a higher position than it actually is.
the key points :
Light is bent or refracted when it passes from one transparent material into another,such as from air to glass and vice versa.
Two effects of refraction are (a)an object in water appears nearer to the surface than it really is and (b)an object such as a stick placed in water appears to be bent.
Refraction is the change in direction of a wave due to a change in its speed. This is most commonly seen when a wave passes from one medium to another.
In optics, refraction occurs when light waves travel from a medium with a given refractive index to a medium with another. At the boundary between the media, the wave's phase velocity is altered, it changes direction, and its wavelength increases or decreases but its frequency remains constant.
For example, a light ray will refract as it enters and leaves glass; understanding of this concept led to the invention of lenses and the refracting telescope.
And also that light from an object bends as it comes out of water ; but our brain thinks the light has moved in a straight line. So, the object appears to be at a higher position than it actually is.
the key points :
Light is bent or refracted when it passes from one transparent material into another,such as from air to glass and vice versa.
Two effects of refraction are (a)an object in water appears nearer to the surface than it really is and (b)an object such as a stick placed in water appears to be bent.
Refraction is the change in direction of a wave due to a change in its speed. This is most commonly seen when a wave passes from one medium to another.
In optics, refraction occurs when light waves travel from a medium with a given refractive index to a medium with another. At the boundary between the media, the wave's phase velocity is altered, it changes direction, and its wavelength increases or decreases but its frequency remains constant.
For example, a light ray will refract as it enters and leaves glass; understanding of this concept led to the invention of lenses and the refracting telescope.
Refraction of Light by 2E4 Shamani Rachel
I learnt from this particular topic that,when the light moves from air to glass,it is refracted towards the normal & when the light moves from glass to air,it is refracted away from the normal.
And also that light from an object bends as it comes out of water ; but our brain thinks the light has moved in a straight line. So, the object appears to be at a higher position than it actually is.
& to summarise the key points :
Light is bent or refracted when it passes from one transparent material into another,such as from air to glass and vice versa.
Two effects of refraction are (a)an object in water appears nearer to the surface than it really is and (b)an object such as a stick placed in water appears to be bent.
Refraction is responsible for image formation by lenses and the eye.
The Snell's Law :D
In 1621, a Dutch physicist named Willebrord Snell (1591-1626), derived the relationship between the different angles of light as it passes from one transperent medium to another.
When light passes from one transparent medium to another, it bends according to Snell's law which states:
Ni * Sin(Ai) = Nr * Sin(Ar),
where: Ni is the refractive index of the medium the light is leaving, Ai is the incident angle between the light ray and the normal to the meduim to medium interface, Nr is the refractive index of the medium the light is entering, Ar is the refractive angle between the light ray and the normal to the meduim to medium interface.
*Information taken from,
www.google.com.sg :
http://www.ps.missouri.edu/rickspage/refract/refraction.html
http://hyperphysics.phy-astr.gsu.edu/Hbase/geoopt/refr.html
& the science textbook.
And also that light from an object bends as it comes out of water ; but our brain thinks the light has moved in a straight line. So, the object appears to be at a higher position than it actually is.
& to summarise the key points :
Light is bent or refracted when it passes from one transparent material into another,such as from air to glass and vice versa.
Two effects of refraction are (a)an object in water appears nearer to the surface than it really is and (b)an object such as a stick placed in water appears to be bent.
Refraction is responsible for image formation by lenses and the eye.
The Snell's Law :D
In 1621, a Dutch physicist named Willebrord Snell (1591-1626), derived the relationship between the different angles of light as it passes from one transperent medium to another.
When light passes from one transparent medium to another, it bends according to Snell's law which states:
Ni * Sin(Ai) = Nr * Sin(Ar),
where: Ni is the refractive index of the medium the light is leaving, Ai is the incident angle between the light ray and the normal to the meduim to medium interface, Nr is the refractive index of the medium the light is entering, Ar is the refractive angle between the light ray and the normal to the meduim to medium interface.
*Information taken from,
www.google.com.sg :
http://www.ps.missouri.edu/rickspage/refract/refraction.html
http://hyperphysics.phy-astr.gsu.edu/Hbase/geoopt/refr.html
& the science textbook.
Thursday, June 19, 2008
Refraction of Light by 2E2 Chee Hui Juan
REFRACTION OF LIGHT
Qn: What is refraction of light?
Refraction is the bending of light due to the change of its speed when it passes from one medium to another of a different optical densities.
Qn: When does it happen? How and when will light bend?
The bending occurs because the speed in which light travels through a substance depends on the substance’s density. Light only bends when it passes from a substances of one density into a substances of a different density. Since light travels slower in water then in air, water is said to have a greater optical density than air.
Qn: What it refractive index?
It is the ratio of speed in light in vacuum and speed of light in the material.
Qn: Effects of refraction?
Bending of objects
Objects partially submerged in water appear bent, shifted and magnified.
Apparent thickness
Glass blocks appear less thick than they actually are.
Apparent depth
Swimming pools appear shallower than they actually are.
Apparent position
At dawn or dusk, then Sun appears to be above the horizon at its apparent position for about four minutes longer than it really is.
Source; textbook resource and http://en.wikipedia.org/wiki/Refraction
Qn: What is refraction of light?
Refraction is the bending of light due to the change of its speed when it passes from one medium to another of a different optical densities.
Qn: When does it happen? How and when will light bend?
The bending occurs because the speed in which light travels through a substance depends on the substance’s density. Light only bends when it passes from a substances of one density into a substances of a different density. Since light travels slower in water then in air, water is said to have a greater optical density than air.
Qn: What it refractive index?
It is the ratio of speed in light in vacuum and speed of light in the material.
Qn: Effects of refraction?
Bending of objects
Objects partially submerged in water appear bent, shifted and magnified.
Apparent thickness
Glass blocks appear less thick than they actually are.
Apparent depth
Swimming pools appear shallower than they actually are.
Apparent position
At dawn or dusk, then Sun appears to be above the horizon at its apparent position for about four minutes longer than it really is.
Source; textbook resource and http://en.wikipedia.org/wiki/Refraction
Refraction of Light by 2E1 Karthik
Refraction is the change in direction of a wave due to a change in its speed. This is most commonly seen when a wave passes from one medium to another.
Refraction of light is the most commonly seen example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another or when water waves move into water of a different depth.
Refraction can be seen when looking into a bowl of water. If a person looks at a straight object, such as a pencil or straw, which is placed at a slant, partially in the water, the object appears to bend at the water's surface. This is due to the bending of light rays as they move from the water to the air. Once the rays reach the eye, the eye traces them back as straight lines (lines of sight). The lines of sight (shown as dashed lines) intersect at a higher position than where the actual rays originated. This causes the pencil to appear higher and the water to appear shallower than it really is.
Another example of refraction
Index of Refraction
The index of refraction is defined as the speed of light in vacuum divided by the speed of light in the medium.
The indices of refraction of some common substances are given below with a more complete description of the indices for optical glasses given elsewhere. The values given are approximate and do not account for the small variation of index with light wavelength which is called dispersion
Refraction of light is the most commonly seen example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another or when water waves move into water of a different depth.
Refraction can be seen when looking into a bowl of water. If a person looks at a straight object, such as a pencil or straw, which is placed at a slant, partially in the water, the object appears to bend at the water's surface. This is due to the bending of light rays as they move from the water to the air. Once the rays reach the eye, the eye traces them back as straight lines (lines of sight). The lines of sight (shown as dashed lines) intersect at a higher position than where the actual rays originated. This causes the pencil to appear higher and the water to appear shallower than it really is.
Another example of refraction
Index of Refraction
The index of refraction is defined as the speed of light in vacuum divided by the speed of light in the medium.
The indices of refraction of some common substances are given below with a more complete description of the indices for optical glasses given elsewhere. The values given are approximate and do not account for the small variation of index with light wavelength which is called dispersion
Refraction of Light by 2E4 Zhang Meiting
Download the original attachment
Refraction Of Light
In this blog reflection, I have chosen refraction of light as my topic. In this topic, I have learnt that refraction of light is when the light goes in or out of the glass, it changes direction because the rays bend. One example I have learn is when I put a cup of water on the table with a straw inside, I realise that the straw has cut into half but as when I take the straw out of the cup, again I realise that the straw is still in it original shape and length. And this experiment had showed me that light changes direction when it passes from one transparent material into another.
And in this particular topic, I know that light bends because its speed changes as it moves from 1 transparent material to another. Also, light travels slower in more dense materials than in less dense materials that why light travels slower in glass than in air. So, when a beam of light passes from air into a glass block, it slows down and bends towards the normal but when the beam of light comes out of glass into air, it will bend away from the normal.
From this particular topic, I learn that when the boundary of 2 optical media, there will be a sudden change in the speed of light to bend, resulting in refraction. Since I know that refraction is caused by a change in speed of light, the relationship between the angle of incidence and the angle of reflection has to be related to this change in speed of light in a medium.
For the effects of refraction I learn so far, a swimming pool appears shallower than it really is. This is because light from an object bends as it comes out of water. But human brain thinks that the light has moved in a straight line. So, the object appears to be at a higher position than it actually is.
The key points of this topic are, light is bend or refracted when it passes from one transparent material into another, such as from air to glass and vice versa. For the refraction I have learn, there are two effects, which are, an object in water appears nearer to the surface than it really is and an object such as a stick placed in water appears to be bent.
All these are found in:
sec2 textbook
sec2 theory workbook
handout
sec4 physics textbook
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html
Refraction of Light by 2E2 Edna Chew
Refraction of Light
Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.
If you have ever half submerged a pen into water, you have probably noticed that the pen appears bent at the point it enters the water.
This optical effect is due to refraction.
When light travels through air it travels at 186,000 miles per second. As the light encounters a water surface some of the light is reflected and some of the light passes into the water. Upon entering the water, however, the light slows down by 46,000 miles per second. This change in speed causes the direction of the light ray to change. When we look at a pencil in a glass of water the light from the pencil in the water is being refracted, so it appears in a different location.
How refraction happens depends on the refractive index of the mediums and the angle between the light ray and the line perpendicular (normal) to the surface separating the two mediums (medium/medium interface).
The angle between the light ray and the normal as it leaves a medium is called the angle of incidence. The angle between the light ray and the normal as it enters a medium is called the angle of refraction.
When light passes from a substance of lower optical density to a substance of higher optical density the light is refracted at a smaller angle relative to the normal. (Figure 1)
When light passes from a substance of higher optical density to a substance of lower optical density the light is refracted a larger angle relative to the normal. (Figure 2)
Figure 1 Figure 2
Refraction is also responsible for rainbows and for the splitting of white light into a rainbow-spectrum as it passes through a glass prism. Glass has a higher refractive index than air and the different frequencies of light travel at different speeds (dispersion), causing them to be refracted at different angles, so that you can see them. The different frequencies correspond to different colors observed.
While refraction allows for beautiful phenomena such as rainbows, it may also produce peculiar optical phenomena, such as mirages and Fata Morgana. These are caused by the change of the refractive index of air with temperature.
Refractive Index
The refractive index of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium.
The refractive index n of a medium is defined as the ratio of the phase velocityc of a wave phenomenon such as light or sound in a reference medium to the phase velocity vp in the medium itself:
Acknowledgement:
http://en.wikipedia.org/
http://library.thinkquest.org/27066/lightrays/nlrefraction.html
http://www.ps.missouri.edu/rickspage/refract/refraction.html
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/mch/refr/more.rxml
Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.
If you have ever half submerged a pen into water, you have probably noticed that the pen appears bent at the point it enters the water.
This optical effect is due to refraction.
When light travels through air it travels at 186,000 miles per second. As the light encounters a water surface some of the light is reflected and some of the light passes into the water. Upon entering the water, however, the light slows down by 46,000 miles per second. This change in speed causes the direction of the light ray to change. When we look at a pencil in a glass of water the light from the pencil in the water is being refracted, so it appears in a different location.
How refraction happens depends on the refractive index of the mediums and the angle between the light ray and the line perpendicular (normal) to the surface separating the two mediums (medium/medium interface).
The angle between the light ray and the normal as it leaves a medium is called the angle of incidence. The angle between the light ray and the normal as it enters a medium is called the angle of refraction.
When light passes from a substance of lower optical density to a substance of higher optical density the light is refracted at a smaller angle relative to the normal. (Figure 1)
When light passes from a substance of higher optical density to a substance of lower optical density the light is refracted a larger angle relative to the normal. (Figure 2)
Figure 1 Figure 2
Refraction is also responsible for rainbows and for the splitting of white light into a rainbow-spectrum as it passes through a glass prism. Glass has a higher refractive index than air and the different frequencies of light travel at different speeds (dispersion), causing them to be refracted at different angles, so that you can see them. The different frequencies correspond to different colors observed.
While refraction allows for beautiful phenomena such as rainbows, it may also produce peculiar optical phenomena, such as mirages and Fata Morgana. These are caused by the change of the refractive index of air with temperature.
Refractive Index
The refractive index of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium.
The refractive index n of a medium is defined as the ratio of the phase velocityc of a wave phenomenon such as light or sound in a reference medium to the phase velocity vp in the medium itself:
Acknowledgement:
http://en.wikipedia.org/
http://library.thinkquest.org/27066/lightrays/nlrefraction.html
http://www.ps.missouri.edu/rickspage/refract/refraction.html
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/mch/refr/more.rxml
Refraction of Light by 2E1 Teresa Zhou
Refraction
Refraction is the change in the direction of light. Refraction is caused by the change in speed experienced by a wave when it changes medium, such as when light passes from one transparent material into another, like from air to glass, air to water, or from water to glass, and also in the opposite directions glass to air.
There is an incident ray (drawn perpendicular to the watefronts), which is a ray that shows the direction which light travels as it approaches the boundary. Similarly, refracted ray (drawn perpendicular to the wavefronts is a ray which shows the direction which light travels after it has crossed over the boundary.
During refraction, light bends first on passing from air to glass, and again on passing from glass to the air again. Light travels faster when moving from a less dense material to a denser material, such as from the air to the glass, and it bends away from the normal, but however when light moves from the glass to the air, which is from a denser material to a less dense material, it travels slower and bends towards the normal.
Refraction has some unusual effects in everyday life. Refraction can cause words to appear nearer to the surface of the glass than they actually are, so the glass block appears to be thinner than it really is. The object can also appear to be at a higher position than it actually is when under the water, like when in a swimming pool, where we think that it appears shallower than it really is. Refraction is even responsible for causing rainbows, splitting their light into the rainbow-spectrums!
Some fun facts about refraction:
Try putting a straw into a glass of water. It would appear bent.
This is because light is moving from a less dense material to a denser material, therefore it bends further away from the normal. In our eyes, we would see that it appears bent.
When a hunter wants to spear a fish that is under water, being experienced, he would aim at a little lower from where the fish is.
Light is moving from air to water, therefore light bends away from the normal. If he were to hit exactly where the fish is, he would miss and end up hitting nothing, so he has to hit lower to hit exactly where the fish is.
Try taking a photo of the waves in the ripple tank; you will see some stripes appearing on your photograph.
Ripples travel from the left and pass over a shallower region inclined at an angle to the wavefront. The waves travel more slowly in the shallower water, so the wavelength decreases and the wave bends at the boundary. The dotted line represents the normal to the boundary. The dashed line represents the original direction of the waves. The phenomenon explains why waves on a shoreline never hit the shoreline at an angle.
The angle of light refraction to create a Rainbow is 42 degrees to the eye of the observer.
The same theory, as when light moves from less dense material to a denser material. It travels faster, and it is bent away from the normal, therefore 42 degrees to the eye of the observer.
Refraction is the change in the direction of light. Refraction is caused by the change in speed experienced by a wave when it changes medium, such as when light passes from one transparent material into another, like from air to glass, air to water, or from water to glass, and also in the opposite directions glass to air.
There is an incident ray (drawn perpendicular to the watefronts), which is a ray that shows the direction which light travels as it approaches the boundary. Similarly, refracted ray (drawn perpendicular to the wavefronts is a ray which shows the direction which light travels after it has crossed over the boundary.
During refraction, light bends first on passing from air to glass, and again on passing from glass to the air again. Light travels faster when moving from a less dense material to a denser material, such as from the air to the glass, and it bends away from the normal, but however when light moves from the glass to the air, which is from a denser material to a less dense material, it travels slower and bends towards the normal.
Refraction has some unusual effects in everyday life. Refraction can cause words to appear nearer to the surface of the glass than they actually are, so the glass block appears to be thinner than it really is. The object can also appear to be at a higher position than it actually is when under the water, like when in a swimming pool, where we think that it appears shallower than it really is. Refraction is even responsible for causing rainbows, splitting their light into the rainbow-spectrums!
Some fun facts about refraction:
Try putting a straw into a glass of water. It would appear bent.
This is because light is moving from a less dense material to a denser material, therefore it bends further away from the normal. In our eyes, we would see that it appears bent.
When a hunter wants to spear a fish that is under water, being experienced, he would aim at a little lower from where the fish is.
Light is moving from air to water, therefore light bends away from the normal. If he were to hit exactly where the fish is, he would miss and end up hitting nothing, so he has to hit lower to hit exactly where the fish is.
Try taking a photo of the waves in the ripple tank; you will see some stripes appearing on your photograph.
Ripples travel from the left and pass over a shallower region inclined at an angle to the wavefront. The waves travel more slowly in the shallower water, so the wavelength decreases and the wave bends at the boundary. The dotted line represents the normal to the boundary. The dashed line represents the original direction of the waves. The phenomenon explains why waves on a shoreline never hit the shoreline at an angle.
The angle of light refraction to create a Rainbow is 42 degrees to the eye of the observer.
The same theory, as when light moves from less dense material to a denser material. It travels faster, and it is bent away from the normal, therefore 42 degrees to the eye of the observer.
Refraction of Light by 2E1 Bank
Refraction
The change in direction of light is called refraction. In an experiment where a straw in a glass of water appears bent, it is because of refraction, light changes direction when it passes from one transparent material into another, like from air to glass, from air to water, from water to glass and in the opposite direction, glass to air.
Light will bend first on passing from one material to another; it will first pass from air to glass and again on passing from the glass to the air again. When light moves from air to glass, it is refracted towards the normal. When the light moves from the glass to air, it is refracted away from the normal.
Light bends because its speed changes as it moves from one transparent material to another. Refraction can be seen when looking into a bowl of water. Air has a refractive index of about 1.0003, and water has a refractive index of about 1.33. If a person looks at a straight object, such as a pencil or straw, which is placed at a slant, partially in the water, the object appears to bend at the water's surface. This is due to the bending of light rays as they move from the water to the air.
We use refraction in mirrors, swimming pools, and many others. Refraction is also responsible for rainbows and for the splitting of white light into a rainbow-spectrum as it passes through a glass prism. Glass has a higher refractive index than air and the different frequencies of light travel at different speeds (dispersion), causing them to be refracted at different angles, so that you can see them. The different frequencies correspond to different colors observed.
Refraction is a topic that I have learnt this term. I never knew that when a straw looks bent in a glass of water, it is actually the cause of refraction. I find it interesting and something new to me.
Throughout the term, I have learnt how to draw the process of refraction and know the definition of refraction. I have learnt how refraction can happen like when light passes through from a less dense material to a denser material or the other way round.
Refraction is always all around me but I never realise it. I am glad to have learnt refraction this term.
The change in direction of light is called refraction. In an experiment where a straw in a glass of water appears bent, it is because of refraction, light changes direction when it passes from one transparent material into another, like from air to glass, from air to water, from water to glass and in the opposite direction, glass to air.
Light will bend first on passing from one material to another; it will first pass from air to glass and again on passing from the glass to the air again. When light moves from air to glass, it is refracted towards the normal. When the light moves from the glass to air, it is refracted away from the normal.
Light bends because its speed changes as it moves from one transparent material to another. Refraction can be seen when looking into a bowl of water. Air has a refractive index of about 1.0003, and water has a refractive index of about 1.33. If a person looks at a straight object, such as a pencil or straw, which is placed at a slant, partially in the water, the object appears to bend at the water's surface. This is due to the bending of light rays as they move from the water to the air.
We use refraction in mirrors, swimming pools, and many others. Refraction is also responsible for rainbows and for the splitting of white light into a rainbow-spectrum as it passes through a glass prism. Glass has a higher refractive index than air and the different frequencies of light travel at different speeds (dispersion), causing them to be refracted at different angles, so that you can see them. The different frequencies correspond to different colors observed.
Refraction is a topic that I have learnt this term. I never knew that when a straw looks bent in a glass of water, it is actually the cause of refraction. I find it interesting and something new to me.
Throughout the term, I have learnt how to draw the process of refraction and know the definition of refraction. I have learnt how refraction can happen like when light passes through from a less dense material to a denser material or the other way round.
Refraction is always all around me but I never realise it. I am glad to have learnt refraction this term.
Refraction of Light by 2E4 Lavanya
REFRACTION
WHAT IS REFRACTION OF LIGHT?
WHEN DOES IT HAPPEN?
HOW AND WHEN WILL LIGHT BEND?
WHAT IS REFRACTIVE INDEX?
EFFECTS OF REFRACTION
Refraction of light refers to the change in the
direction of light.
Refraction of light occurs when it passes from
one transparent material into another.
3a.When light moves from glass to air (a less dense
material), it speeds up and is refracted away from
the normal.
Light twists outward when entering
Medium of lower index of refraction
3b. When light moves from air to glass (a denser material),
it slows down and is refracted towards the normal.
Light twists inward when entering
medium of higher index of refraction
4. The effects of refraction are causing an object to appear nearer than it actually is when a transparent material is on top.
WHAT IS REFRACTION OF LIGHT?
WHEN DOES IT HAPPEN?
HOW AND WHEN WILL LIGHT BEND?
WHAT IS REFRACTIVE INDEX?
EFFECTS OF REFRACTION
Refraction of light refers to the change in the
direction of light.
Refraction of light occurs when it passes from
one transparent material into another.
3a.When light moves from glass to air (a less dense
material), it speeds up and is refracted away from
the normal.
Light twists outward when entering
Medium of lower index of refraction
3b. When light moves from air to glass (a denser material),
it slows down and is refracted towards the normal.
Light twists inward when entering
medium of higher index of refraction
4. The effects of refraction are causing an object to appear nearer than it actually is when a transparent material is on top.
Refraction of light by 2E4 Chua Xue Ting
Refraction of light is not difficult to learn. Refraction happen everywhere, and anytime it can happen when a person uses a mirror to see their look, and can happen when a light shine on a metal object. Refraction is a bouncing off light through refraction mirror. There are two type of refraction mirror, concave and convex mirror. Concave mirror is use as Security
Mirror and use at blind corner. Convex mirror is use as face mirror. Refraction of light cannot occur when there is no refracted object.
There is a lot of refraction object- example metal spoon, shiny watch and keychain. These object is a good refraction object. Normally, a good refraction object is easier to catch fire than non refraction. This is because refraction object get more light to heat up.
Light rare cause the light to bend when pass through the glass. This is because the air is denser than the glass, so when light rare passes through the glass.
Mirror and use at blind corner. Convex mirror is use as face mirror. Refraction of light cannot occur when there is no refracted object.
There is a lot of refraction object- example metal spoon, shiny watch and keychain. These object is a good refraction object. Normally, a good refraction object is easier to catch fire than non refraction. This is because refraction object get more light to heat up.
Light rare cause the light to bend when pass through the glass. This is because the air is denser than the glass, so when light rare passes through the glass.
Subscribe to:
Posts (Atom)