Question

an incident ray strikes a plane mirror at an angle of incidence of 50 degree what is the decrease in the angle of reflection if the incident ray moves to an angle of incidents of 30degree

Answer 1

Angle of reflection will decreaSe by an angle of 20° since angle of incidence is equal to angle of reflection.

Answer 2

Angle of reflection will 30 degree because angle of incident is always equal to angle of reflection so if incident =30 degree then reflection angle=30 degree.