Tyndall effect is a phenomenon of

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Tyndall effect is a phenomenon of

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scattering of light by the colloidal particles.
refraction of light by the colloidal particles.
dispersion of light by dust particles.
refraction of light by dust particles.
This question was previously asked in
UPSC NDA-2 – 2021
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The correct answer is A) scattering of light by the colloidal particles.
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.
This phenomenon is exhibited by colloidal solutions and fine suspensions, but not by true solutions. It is used to distinguish between a true solution and a colloidal solution. While dust particles can also scatter light, the term Tyndall effect is specifically associated with scattering by colloidal particles.

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