RRB RPF RPSF SI and CONS Model Papers 4 with solutions

(2) Diffusion of light takes place due to dust particles. During the reflection of light from a mirror, the angle of reflection equals the angle of incidence. Similarly, when light is reflected from a piece of plain white paper, the reflected beam is scattered, or diffused. As the surface of the paper is not smooth, the reflected light is broken up into many light beams that are reflected in all directions.