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A light ray is incident on a smooth refl...

A light ray is incident on a smooth reflecting surface making an angle of incidence 2i. If the angle of incidence is doubled, then the deviation of the light ray is equal to ______ .

A

90-40i

B

90-2i

C

2i

D

180-8i

Text Solution

Verified by Experts

The correct Answer is:
D
Initial angle of incidence =2i
Angle of incidence when doubled `=2xx2i=4i`
Therefore, angle of deviation `=180-(4i+4i)=180-8i`
Hence, the correct option is (d)
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