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Physics > Wavelengths and Frequencies of Coloured Light

The table below shows approximate frequencies (in terahertz) and wavelengths (in nanometers) for various pure spectral colours. These are colours that can be produced by visible light of a single wavelength.

The wavelengths have been measured in vacuum.

The table should not be taken as a complete and definitive list of spectral colours as the spectrum can be divided in various ways. The vales below however provide good examples of subdivisions of the visible part of the electromagnetic spectrum.

Color Wavelength Interval Frequency Interval
Red
~ 625–740 nm
~ 480–405 THz
Orange
~ 590–625 nm
~ 510–480 THz
Yellow
~ 565–590 nm
~ 530–510 THz
Green
~ 500–565 nm
~ 600–530 THz
Cyan
~ 485–500 nm
~ 620–600 THz
Blue
~ 440–485 nm
~ 680–620 THz
Violet
~ 380–440 nm
~ 790–680 THz