The Tyndall effect is the phenomenon of scattering the beam of light by a medium containing small suspended particles. This effect is exhibited by all colloidal solutions and some very fine suspensions. Therefore, it can be used to verify if a given solution is a colloid. The intensity of scattered light depends on the density of the colloidal particles as well as the frequency of the incident light. It is majorly caused by reflection of the incident radiation from the surfaces of the particles, reflection from the interior walls of the particles and refraction and diffraction of the radiation as it passes through the particles.