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Lighting Glossary
Term:
Spectral Colour
A color corresponding to light of a pure frequency; the wave lengths of visible electromagnetic radiation - light - range from 380 to 780 nanometers (nm; 1 nm = 10-9 m). Each wavelength corresponds to a specific colour on the spectrum. An optical prism makes the colours of the spectrum visible - e.g. in a rainbow, created by raindrops which work like a prism.
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