GeneralAnswersv1

Why does the daytime sky look blue?

Shorter visible wavelengths scatter more strongly in the atmosphere.

Output

A sky that appears predominantly blue

Input

White sunlight entering Earth’s atmosphere

Input

White sunlight entering Earth’s atmosphere

A sky that appears predominantly blue

Relationship

Small molecules scatter shorter visible wavelengths much more than longer ones. Scattered blue light reaches observers from across the sky.

spaceplace.nasa.gov: Why does the daytime sky look blue?spaceplace.nasa.govUS-PUBLIC-DOMAIN