Question

why does sky appear blue give reasons???????Plzzzz it's urgent. (In easy language)

Answer 1

Sunlight reaches the Earth's atmosphere and is scattered in all directions by the gases and particles in the air. Blue light is scattered more than the other colours because it has the shortest wavelength. This is why the sky appears blue to an observer from the surface of the Earth. For an astronaut staying in the international space station orbiting the Earth, the colour of the sky will be black because the light reaching it does not scatter.

in easy it is because of refraction of light

Answer 2

This same question had been asked by Dr. C.V. Raman but he didn't ask from anyone but you had asked this on brainly so I have to answer you
so, The sky appears to be blue when we see it from Earth this happen because of the scattering affect of light. This phenomenon was introduced by Dr. C.V. Raman.
So the reason for this is that when light collides with particles in the atmosphere. the light is redirected in many directions. The blue light is scattered more than the red light causing the sky to be blue.

In the space, there is no atmosphere. So, light will not scatter in space. This is the cause of dark sky when viewed from space.