Draw a neat and labelled diagram of the experimental set up for observing the scattering of light in a colloidal solution of sulphur to show how the sky appears blue, and the sun appears red at sunrise and sunset.

Why does the sun appear red at sunset ?

Why are the 'danger signal' lights red in colour?

Out of blue light and red light, which one is scattered more easily?

Which component of sunlight is scattered away when the sun appears red at sunrise or sunset?