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A light ray is incident on a planemirror...

A light ray is incident on a planemirror at an angle of `30^(@)` with horizontal. At what angle with horizontal must a plane mirror be placed in its path so that it bacomes vertically upwards after reflection?

A

`40^@`

B

`20^@`

C

`30^@`

D

`60^@`

Text Solution

Verified by Experts

The correct Answer is:
C
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