Question

What do sky appears blue

Answer 1

If you look away from the Sun, blue light travelling from the Sun through the earth's atmosphere ( but not directly towards you ) is scattered by the molecules toward your eyes. Thus, the sky looks blue because scattering from molecules is much more probable for blue light than red.

Answer 2

Hey mate !!
Here's your answer :))

The light from d sun has to travel a long distance of d earth's atmosphere before reaching us. As light travels thought d atmosphere, it gets scattered in different directions by d air molecules present in its path. The blue (or violet) light due to its short wavelength is scattered more as compared to d red light of long wavelength. Thus d light reaching our eye directly from sun is red colour, while d light reaching our eye from all the other directions is d scattered blue light. Therefore the sky appears to be blue .

Hope this helps☺☺