Reflection of Light by 2E3 Rachel Ng

The ray of light which strikes the surface is called the incident ray.
The ray of light which leaves the surface is called the reflected ray.
A line perpendicular to the surface is imagined at the point of reflection. This line is called a normal. And when a ray of light strikes the mirror at a right angle,it is reflected along the same path.

When a ray of light hits a plane mirror at an angle to the normal(called the angle of incident), it is reflected at an equal angle but on the opposite side of the normal(angle of reflection).these two angles are always equal no matter how light rays strike the mirror.
A flat mirror,called plane mirror,is a good reflector of light.

WHAT IS REFLECTION OF LIGHT??
ANS:Reflection is the bouncing off light after hitting a mirror surface.

WHEN DOES IT HAPPEN?
ANS:it happen when the light travel and bounce off after hitting a mirror surface:)

IMAGES IN A PLANE MIRROR
In a plane mirror:
The image is upright
And the image is also of the same size as the object.
The image lies far behind the mirror
But the object is in front of the mirror.
The image is also laterally inverted in a plane mirror.
(Laterally inverted = opposite side)
The image formed is always a virtual image.
(virtual = cannot be capture on screen)

TYPE OF REFLECTION

REGULAR REFLECTION!!
When a parallel beam of light hits a smooth surface such as a plane mirror, it is reflected as a parallel beam. This is called regular reflection. An image is formed with regular reflection. That is. When we look at a smooth surface,we can see an image.
Regular reflection takes place when a parallel beam of light strikes a smooth polished surface and it is reflected back as a parallel beam of light. Reflection from mirror and metallic surface are example of regular reflection.
Regular reflection
On a smooth surface,a parallel beam of light is reflected as a parallel beam.
An image is formed.

DIFFUSE REFLECTION!!
Most surfaces, are usually quite rough. When a beam of light hits a rough surface,the individual rays are reflected in different directions. So no image is formed. This type of reflection is called diffuse reflection.
Diffuse reflection or irregular reflection takes place when a parallel beam of light strikes a rough surface and it is reflected back in different random directions reflected from object such as trees and are example of diffused reflection.
Diffuse reflection
On a rough surface.
A parallel beam of light is reflected as individual rays reflected in different directions
No image is formed.

USES OF PLANE MIRRORS!!

uses of plane mirror:
Help a driver see the traffic behind.
Helps a person check appearance.
Makes s room appear bigger.

USES OF CURVE MIRROR!!
Curve surface can also act as mirrors. Curved mirror can be convex(like the back of a spoon) or concave(like the front of a spoon).The images formed by these mirror are different from those formed by plane mirror. Convex mirror form upright images that are always smaller than the object. They also have large “field of view” ,that is, they allow many thing to be seen.

USES OF CURVE MIRROR!!

Convex mirrors from upright image that are always smaller than the object, They allow many thing to be seen.

Concave mirror form upright magnified if the object is close to the mirror. If the image is further away,the image is inverted.

RESOURSE!!
http://www.google.com.sg/search?hl=en&q=convex+mirror&meta=
http://www.google.com/
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