Question

how size of the particles in solutions, suspension, colloids affect the scattering of light when a light is made to pass through it?

Answer 1

Depending on the particle size solution can be classified in the following categories:

true solution ( size < 1nm)

suspension (size between 1-1000nm)

colloidal solution ( size> 1000nm)

Particles in the true solutions are invisible. Particles of the suspension are visible to the naked eye or under a microscope. In case of colloids scattering of light by the particles is observed under ultramicroscope. Therefore depending on the particles size scattering of the light affected.