Question

What is the difference between scattering and dispersion of light

Answer 1

scattering is the process in which an incident beam of light is redirected in many different directions when it interacts with a particle of matter...when sunlight strikes atoms in our atmosphere, the light is redirected in many directions...in fact, the blue light is scattered over greater angles than the red light causing the appearance of the blue daylight sky 

dispersion is the process in which different wavelengths of light travel at different speeds when moving through a substance. all wavelengths of light travel at the same speed (what we call the speed of light) when traveling in a vacuum, but different wavelengths travel at different speeds through denser substances 

when light passes through a prism, different wavelengths travel at different speeds, and therefore refract (bend) at different amounts...this is why prisms can separate light into its component wavelengths

Answer 2

These two are different phenomena. The phenomenon of splitting of light into its 'component colours' is dispersion. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray this phenomenon is scattering of light.