Visible Spectrum
The visible spectrum can be seen by passing light through a glass prism.
Colours Remember them by
Red Richard
Orange Of
Yellow York
Green Gave
Blue Battle
Indigo In
Violet Vain
Here are average wave lengths for these colours:
Red 700nm
Orange 590nm
Yellow 570nm
Green 530nm
Blue 480nm
Indigo 470nm
Violet 430nm