Reflection is the change of direction of a wave front between two different materials such that the wave front returns into the material from which it started from. The law of reflection states that for a specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Mirrors are an example of specular reflection. Reflection of light can be mirror like or diffused depending on the nature of the material interface.
The laws of reflection are as followed:
- The incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence lie in the same plane
- The angle which the incident ray makes with the normal is equal to the angle which the reflected ray makes to the same normal
- The reflected ray and the incident ray are on the opposite sides of the normal
The reflection equation which these three laws are derived from is:
X – 2(v,x)v = x – 2v(vHx)