Question

if the angle between the plane mirror and the indicates ray is 40 degree what are the angles of incidence and reflection?

Answer 1

∠i =∠r (laws of reflection)

Given that the angle between the plane mirror and the indicates ray is 40 degree then,

∠i = 90°-40° ( normal is perpendicular to the mirror surface)

∠i = ∠r= 50°