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A thin prism has different medium on its...

A thin prism has different medium on its either side. A light ray is incident almost normally on the first face. What is the angle of deviation if all the angles are very small

A

`I(1-mu_1/mu_2)-A(1-mu/mu_2)`

B

`I(1-mu_1/mu_2)+A(1-mu/mu_2)`

C

`I(1-mu_1/mu_2)-A(1-mu/mu_2)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
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