Question

Two plane mirrors are inclined to each otherat an angle theta.a ray of light is reflected first at one mirrorand then at other.the total deviation of ray is

Answer 1

Answer:

ANSWER

∠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)

=360−20