Question

A plane mirror is a mirror with a flat reflective surface
An incident ray is a ray of light that strikes a surface. The reflected ray corresponding
to a given incident ray, is the ray that represents the light reflected by the surface.
In figure, m and n are two plane mirrors perpendicular to each other.

Answer 1

Answer:

Step-by-step explanation:

A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal (an imaginary line perpendicular to the surface).

Answer 2

Consider a plane-mirror and a fixed incident ray of light reflecting from the surface at an angle. Before the mirror has rotated, the angle of incidence is the angle of reflection. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal.