Tyndall effect can also occur when sunlight passes through _________ into a room.

a wide opening

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a small hole

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both A and B

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none of the above

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Solution

The correct option is C a small hole
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. Tyndall effect is due to scattering of light by colloidal particles. The path of light beam through the colloid become visible.

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