What physical process is responsible for the familiar blue color of the daytime sky?

Answer

Rayleigh scattering

The daytime sky color is attributed to Rayleigh scattering, where tiny molecules of nitrogen and oxygen in the atmosphere effectively scatter shorter wavelengths of light, specifically blue and violet, in all directions.

What physical process is responsible for the familiar blue color of the daytime sky?
Darknessweatherskyatmospherephenomenon