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

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Normal to the face through which it emerges

Inclined at 30o to the face through which it emerges

Inclined at 60o to the face through which it emerges

None of the above

answer is A.

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Detailed Solution

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

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