Everything CCEA students need to know about the reflection and refraction of light for GCSE Physics.

Refraction is the bending of light when it goes from one medium to another so, when a ray of light passes through a prism it deviates.

But only Newton saw what this implies: that refraction is then all there is to it. The colors themselves are already in the white light, and all the prism does is to separate them out.