Why is the sky blue?

Answer: Air scatters blue light more

Air scatters blue light more ✓ — Correct! Sunlight is white, containing all colors. When it hits Earth's atmosphere, tiny air molecules scatter it. Blue light has shorter waves that scatter more easily than other colors. So blue light bounces everywhere in the sky while other colors pass through more directly, making the sky appear blue.

Sun emits mostly blue light — Wrong. The Sun emits white light containing all colors of the spectrum. The sky appears blue because Earth's atmosphere scatters blue light more than other colors.

Our eyes prefer blue — Wrong. Our eyes can see all colors equally well. The sky looks blue because atmospheric molecules scatter blue wavelengths of sunlight more than other colors.