He found that if a beam of white light is passed through glass prism then it will split in to seven colours. These colours are red, orange, yellow, green, blue, indigo and violet (VIBGYOR).

We can separate white light into all its different colours using a glass prism. The prism bends different colours of light at different angles. This is called refraction.

The prism concept is still being applied to windows. 3M daylight redirecting film serves the same purpose, directing a portion of the light coming through the window upwards to bounce off the ...

Learn about the spectrum of colours found in visible light, how to split white light and the primary and secondary colours of light in this guide for KS3 physics students aged 11-14 from BBC Bitesize.

The colors themselves are already in the white light, and all the prism does is to separate them out. As he put it, "Light consists of Rays differently refrangible" [meaning refractable].

Inside white light are the colors of the rainbow: red, orange, yellow, ... A simple way to fracture white light into a rainbow is by creating a prism with a glass of water.