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What is Tyndall effect?...

What is Tyndall effect?

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Tyndall effect. Because of the small size of colloidal particles, we cannot see them with naked eyes. But, these particles can easily scatter a beam of visible light. This scattering of a beam of light is called the Tyndall effect after the name of the scientist who discovered this effect. For example, mixture of water and milk shows Tyndall effect as shown in Fig. 2.2

Tyndall effect can also be observed when a fine beam of light enters a room through a small hole. This happens due to the scattering of light by the particles of dust and smoke in the air.
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