Question

How do we know that white light is made up of different colors? What is the evidence?

Answer 1

White light is composed of all the visible colors in the electromagnetic spectrum, a fact that can be easily proven through the use of a prism. ... Because each color is refracted differently, each bends at a different angle, resulting in a fanning out and separation of white light into the colors of the spectrum.

Answer 2

each color has a wave length .When all the waves are seen together, they make white light. White light is actually made of all of the colours of the rainbow because it contains all wavelengths, and it is described as polychromatic light.