Question

A ray of light is incident normally on a plane mirror. What will be the

(a) angle of incidence?
(b) angle of reflection?

Answer 1

(a) The angle of incidence is 0^o because the incident ray is parallel to the normal.
(b) The angle of reflection is 0^o in accordance with the first law of reflection, which states that the angle of incidence is equal to the angle of reflection.