what is the reason of tyndal effect? also what is the relation between dispersed particle's diameter and wavelength of light used?

Answers (1)

The Tyndall effect is the phenomenon in which the particles in a colloid scatter the beams of light that are directed at them. 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. Tyndall effect is observed when refractive indices dispersed phase and dispersion medium are different and dispersed particles have a diameter much smaller than the wavelength of light used. 

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