To find the refractive index of light in different materials.

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TILLE :what are the refractive indexes of light in different material?

AIM : To find the refractive index of light in different materials.

APPARATUS :

Ruler

Protractor

Plain paper

Ray box

Perspex block

Water Container

Glass block

DIAGRAM

BACKGROUND INFORMATION

When a light ray travels from air into a clear material such as glass or water, you can see the ray change direction. This is called refraction. Refraction happens because light travels faster in the air than in other substances. The amount by which a light ray bends when it goes from air into another material depends on two things :

(a) what the material is

(b) The angle of incidence

The angle of incidence is the size of the angles between the ray before it enters the substance and the normal. The angle of refraction is the angle between the ray after it has bent , and the normal.
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The amount by which the ray bends is determined by the refractive index of the material.

METHOD

Placed a glass block in the middle of the white paper, and a templete of the block was drawn on the middle of the paper.A normal of 90 degree was build on one side of the block .Another line was drawn where the point the normal and the block meet. The angle between the normal and the line was calculated and recorded .A ray box was placed and to let the light ray on the same line as the ...

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