How do we change colour?. Kat Street. The Spectrum. White light is made up of many different colours. The range of colours in white light is called the spectrum. Refraction through glass or water can split white light into its spectrum. Mixing Colours. Light has three primary colours.
White light (all colours)
What colour would it be in red light…?
Green box in white light
A green box in red light would appear black because it absorbs all the available colours.
Coloured Objects - questions