Question

if a reflected ray is reversed and becomes the new incident ray,where do you think the correspondent ray will be?

Answer 1

Explanation:

Now, if reflected ray is reversed and then incident on the mirror (it also falls normally), then the reflected ray again retraces the same path. Thus, it will be along the normal on the mirror surface. If it is a plane mirror then the incident ray is perpendicular to the surface of the mirror.