Question

Why the colour of clear sky is blue

Answer 1

Answer:

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.

Explanation:

Answer 2

Answer:

the colour of clear sky appears to be blue because the red light has a wavelength about 1.8 times greater than the blue light. Thus when sunlight passes through the atmosphere, the fine particles in the air scatter the blue light.