Question

what would be the colour of sky if there is no atmosphere?give reason.

Answer 1

We can see an object when light reflected from that object enters into our eye. If light is not reflected from an object, it appears dark to us. There are many particulate matter(gases, clouds etc) which float in the atmosphere and help in scattering the sunlight and as a result, we can see the sky. But if no atmosphere were there, then no scattering would take place and the sky would appear dark.

Answer 2

In the absence of any atmosphere, there will be no scattering of sunlight and the sky will appear dark.