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A ray of light travelling in the direction `1/2 (hati+sqrt(3)hatj)` is incident on a plane mirror. After reflectiion, it travels along the direction `1/2(hati -sqrt(3)hatj)`. The angle of incidence is

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`75^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
Normal is parallel to Y - axis and given directions are at angle `60^@` with the the X - axis Hence, angle with the normal becomes `30^@`
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