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Q.

A light ray incident normally on one of the face of a triangular prism follow the path as shown below, then the angle of refraction r2 at the second face is

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a

90°

b

45°

c

60°

d

30°

answer is C.

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Detailed Solution

The given prism can be shown as below⇒30∘=0+r2⇒r2=30∘

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Given, 
A=300,i=00⇒ r1=00
As the angle of prism, A=r1+r2
 

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