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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 - 4i`

B

`90 - 2i`

C

2i

D

`180 - 8i`

Text Solution

Verified by Experts

The correct Answer is:
D
Intial angle of incidence = 2i
Angle of incidence when doubled ` = 2 xx 2i = 4i `
Therefore , angle of deviation ` = 180 -(4i + 4i)`
` = 180 - 8i` .
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