Why is the sky blue?

Question

Why is the sky blue?

Answer 1

Under the Rayleigh scattering principle, blue light scatters against gases more than red or green light. The blue, combined with how the human eye perceives color, dominants the field of the sky.

Answer 2

The reflection of the sun's light in our atmosphere makes the sky blue!

Answer 3

technically the sky is a ligth purple but it appears blue because of the reflection from the ocean water considering the earth is made up of 2/3 water

Answer 4

Because it is the refraction of the water on the earth to the sky.