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Why the sun looks red at the time of setting? Explain on the basis of colloidal properties.

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Why the sun looks red at the time of setting? Explain on the basis of colloidal properties.

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At the time of setting, the sun is at the horizon. The light emitted by the sun has to travel a longerdistance. As a result the blue part of the light is scattered away by the dust particles in the atmosphere. Hence the red part is visible.

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