Q.

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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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

answer is 1.

(Detailed Solution Below)

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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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