why do clouds appear red sometimes at night?

Asked by aarti prakash | 2nd Apr, 2011, 04:01: PM

Expert Answer:

Dear student
When the sun is low in the sky, at dawn and dusk, sunlight travels through more atmosphere than at other times of day. The red wavelength is better able to go on a direct course and be reflected back off clouds, whereas the blue light is more scattered before reaching the cloud and is therefore less visible. So, we see the clouds as red as the light that is reaching them is primarily red.
Hope this clarifies your doubt.
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Team
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Answered by  | 4th Apr, 2011, 11:59: AM

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