Question

How do you explain blue colour of sky when you observe from earth?
Will you do the same explanation from the surface of Moon?​

Answer 1

Answer:

Hey there

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light.  When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

The daytime sky is indeed blue as seen from space. Look closely at any color-accurate photograph of earth taken from space and the blue tint of everything on the day side is unmistakable. This blue tint is the sky. The daytime sky as viewed from space is not a solid, uniform blob of blue for two reasons: (1) there are white clouds in the sky which can be seen just as well from space as from earth's surface, and (2) the sky is not opaque.

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