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What is the angle of incidence for an eq...

What is the angle of incidence for an equilateral prism of refractive index `sqrt(3)` so that the ray si parallel to the base inside the prism?

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`75^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) The ray retraces its path after reflection from the silvered face AC. Therefore, `angleARQ=90^(@)`. As is clear from the figure, the angle of reflection RQN at face AB is `30^(@)`.
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