Question

Two plane mirrors are inclined to each other at an angle of 45 degrees . A ray of light is incident on Mirror I and is reflected by mirror I and later by mirror II. The total deviation of the ray for the given situation is

Answer 1

Answer:

Correct option is

A

360

o

−2θ

∠BAD=x ∠ABD+y is two incidence angle

⇒∠OBA=90−y ∠OAB=90−x

ΔOAB;θ+90−y+90−1=180

⇒x+y=θ

Total deviation is 2(90−x)+2(90−y)

=360−2(x+y)

=360−2θ

solution