This means that the light leaving the prism is spread out into its different colours, a process called dispersion. This experiment is recorded as first being carried out by Isaac Newton ...

A thin beam of white light from an overhead projector goes into a prism, dispersing the colours into a rainbow. Turn on the projector. Hold the prism by the parallel flat faces, with one of the points ...

The prisms in question were originally in ... fundamental discoveries and subsequent work of Newton on the dispersion of white light. Signor Algarotti was a great admirer of Newton and was the ...