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
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