law of reflection?

Dear student ,
The law of reflection states that when a light ray is incident on a plane surface, the incident ray, the reflected ray and the “normal” to the surface of the mirror all lie in the same plane.
It also states that the angle the incident ray makes with the normal is equal to the angle that the reflected ray makes with the normal.


here i= angle of incident 
r= angle of reflection 

according to law
angle i = angle r

hope answer will help you 
regards,