Question

why is sky is blue?

Answer 1

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.

Answer 2

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The sky is blue because molecules present in air scatters the blue light most from the sun than that of red light...

Due to this scattering of blue light by air molecules... a blue colour enters into our eyes and we saw the sky; blue in colour...

But during sunset we saw the sky in reddish colour because at that time blue light has been scattered out and red - orange colour reach to our eyes...

Hence, during sunset we saw the sky in reddish colour...

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