Unit - 4.2 Reflection Of Light On Plane Surfaces — PHYSICS STD 7 — Question

When a beam of parallel light rays is incident on a rough surface, the reflected rays scatter in different directions. This type of reflection is called irregular or diffuse reflection. In this case, the angle of reflection of the light is equal to the angle of incidence. Reflection from a rough surface is called diffuse reflection.
Name two materials from which irregular reflection takes place – wall, wood, a piece of wool.
The importance of irregular reflection for an object to be seen, it must reflect light irregularly.