The term Tyndall effect is usually applied to the effect of light scattering on particles in colloid systems, such as suspensions or emulsions. ... Since, colloids have particles in them which scatter the passed light, they show tyndall effect.

Why colloidal particles show tyndall effect?

The Tyndall effect is the scattering of light as a light beam passes through a colloid. The individual suspension particles scatter and reflect light, making the beam visible. ... It is shown by colloidal particles because the colloidal particle size is roughly equal to the wavelength of the light.

Why colloids do not show tyndall effect?

(a) In a colloidal solution, the particle size is such (1 nm to 100 nm), that these particles scatter the light rays as they fall on them. Because of scattering, the path of the light as well as the particles become visible. ... Therefore, true solution does not show any Tyndall effect.