Answer to Question #238061 in Physics for WwW

Question

why is sky blue

Answer 1

As white light passes through our atmosphere, tiny air molecules cause it to ‘scatter’.

The scattering caused by these tiny air molecules (known as Rayleigh scattering) increases as the wavelength of light decreases.

Violet and blue light have the shortest wavelengths and red light has the longest.

Therefore, blue light is scattered more than red light and the sky appears blue during the day.