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Questions  

A ray of light is incident at an angle of 60o  on one face of a prism of angle 30o . The ray emerging out of the prism makes an angle of  30o with the incident ray. The emergent ray is

a
Normal to the face through which it emerges
b
Inclined at  30o to the face through which it emerges
c
Inclined at 60o  to the face through which it emerges
d
None of the above

detailed solution

Correct option is A

i=60oA=30oD=30oD=i1+i2−A30=60+i2−30i2=0  it comes out normally.

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