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A ray of light is incident at angle I on...

A ray of light is incident at angle I on a surface of a prism of small angle A and emerges normally from the opposite surface. If the refractive index of the material of the prism is `mu`, the angle of incident I is nearly equal to

A

`A//mu`

B

`A//2mu`

C

`muA`

D

`(muA)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`mu=sin(sin i)/(sin r)=(sin i)/(sin A)=(i)/(A)` (for small angle)
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