Newton and the Imaginary Colour

Newton and the Imaginary Colour

Mar 30

Newton apparently added indigo to the spectrum in order to make it up to 7 colours. This was more in keeping with his view of the cosmos. Here the spectrum is explored a little.

Make Your Own Spectrometer

Make Your Own Spectrometer

Jul 02

Spectrometers are used, like prisms, to spread light out into the component colours. This enables us to understand the compositions of everything from stars to streetlights. Here I show you how to make your own spectrometer and give you a few examples of what you can see with it.