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State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each ?

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The sun rays have to travel through a larger atmospheric distance. As λbλrmost of the blue light and shorter wavelengths are removed by scattering. Only red colour, which is least scattered is received by our eye and appears to come from sun. Hence the appearance of sun at sunset or sunrise or full noon near the horizon may look reddish.

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