DIFFUSION OF LIGHT

When light is reflected from a mirror, the angle of reflection equals the angle of incidence. When light is reflected from a piece of plain white paper; however, the reflected beam is scattered, or diffused, as shown in figure 2-6. Because the surface of the paper is not smooth, the reflected light is broken up into many light beams that are reflected in all directions.

Figure 2-6. - Diffusion of light. 

Q.12 When light strikes a piece of white paper, the light is reflected in all directions. What do we call this scattering of light?