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What do you mean by Tyndall effect?​

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Tyndall effect

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Alternative Titles: Tyndall phenomenon, Tyndall scattering

Tyndall effect, also called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window. The effect is named for the 19th-century British physicist John Tyndall, who first studied it extensively.