Question

What makes the sky blue?

Answer 1

sky isn't blue, we see the sky in blue because of the scattering of blue light that falls in our eyes

Answer 2

The sky is blue due to a phenomenon called Raleigh scattering. This scattering refers to the scattering of electromagnetic radiation (of which light is a form) by particles of a much smaller wavelength. ... These shorter wavelengths correspond to blue hues, hence why when we look at the sky, we see it as blue