A ray of light travelling in the directi...

A ray of light travelling in the direction `(1)/(2)``(hati,+sqrt3hatj)` is incident on a plane mirror. After reflection, it travels along the direction `(1)/(2)(hati-sqrt3hatj)` . The angle of incidence is

A

`30^@`

B

`45^@`

C

`60^@`

D

`75^@`

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The correct Answer is:

A

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