Question

Two plane mirrors are inclined at an angle of 75'. A ray of light is incident on one of the mirrors
The ray undergo total deviation of
(1) 210°
(2) 105°
(4) 75°
(3) 150°

Please tell me the answer anyone

I urgently need it ​

Answer 1

Answer:

Given that,

Angle θ=80

0

We know that,

The reflection of light perpendicular to the first mirror it takes an angle of 90

0

and since it is incident on the other plane mirror so, it will take an angle of 90

0

as well.

Now, the total deviation

=90

0

+90

0

=180

0

For every plane mirror of any angles

Hence, the total deviation is 180

0