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An equilateral prism is placed on a hori...

An equilateral prism is placed on a horizontal surface. A ray PQ is incident onto it. For minumum deviation,

A

PQ is horizontal

B

QR is horizontal

C

RS is horizontal

D

Either PQ or RS is horizontal

Text Solution

Verified by Experts

The correct Answer is:
B
During minimum deviation the ray inside the prism is parallel to the base of the prism in case of an equilateral prism.
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