Question

Why the sky is blue?​

Answer 1

as sunlight of all colors passes through air, the blue part causes charged particles to oscillate faster than does the red part. ... More of the sunlight entering the atmosphere is blue than violet, however, and our eyes are somewhat more sensitive to blue light than to violet light, so the sky appears blue

Answer 2

$\huge\fbox\red{A}\LARGE\fbox\pink{N}\fbox\green{S}\LARGE\fbox\blue{W}\fbox\orange{E}\huge\fbox\red{R}$

A clear cloudness day-time sky is blue because N2 and O2 molecules in the air scatter blue light from the sun.