Question

what is law of reflection

Answer 1

 the principle that when a ray of light, radar pulse, or the like, isreflected from a smooth surface the angle of reflection is equal to the angle of incidence, and the incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.

Answer 2

reflection may be regular or diffuse the point of reflection is at incident ray reflecting ray and normal it can be much better explained with the help if a diagram