WHAT IS A PRISM ?

One of the most important experiments on light was made by Isaac Newton.He discovered that sunshine is made up of many colors. Over 300 years ago, Sir Isaac Newton passed a beam of white light through a prism. Newton then sent this light through a second prism where the light became white once again. What Sir Isaac Newton actually do is that he first took the white light apart and then he put it back together again

A prism is a triangular piece of glass, which allows light to spread out into a band of six colors

PRISM EXPERIMENT