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If a light ray incidents normally on one...

If a light ray incidents normally on one of the faces of the prism of refractive index 2 and the emergent ray just grazes the second face of the prism, then the angle of deviation is

A

0°

B

30°

C

60°

D

90°

Text Solution

Verified by Experts

The correct Answer is:
C
`r_(1)=0,mu=1/(sinr_(2)),r_(2)=A, d=i_(1) + i_(2)-A`
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