Question

why is the colour of the sky is blue

Answer 1

Here is your answer :-

Colour of sky is blue because Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere.
Blue light is scattered more .

Hope it helps ..thnx

Answer 2

scattering of light is responsible...
in atmosphere nitrogen molecules are abundant.
so nitrogen molecules size fits the size which can scatter blue light...
so mostly sky appears blue.

HOPE IT HELPS U