How many colours is light made up of? Should it be infinite because of colours like light-blue , fluoroscent-blue , cyan ,dark green , sap green , etc.?
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The word "color" for light is multi-valued because , one value is the physics behind it, the other is interactions of light with the biochemistry of the eye and the brain.
As far as the spectral colors part of which is visible light with its colors, One could say "infinite" as both the extent and the density of frequencies of the spectrum cannot be counted. The word "color" applied to the visible frequencies as seen here:
See the whole table here. The values of frequency sis shown continuous in the colored section , and the same for the whole range
BUT there exists "perception of color" where different spectral color frequencies added and hitting the retina and translated in the eye as color, the same as the eye translates the spectral color, show that what we call "color" can depend on many frequencies.
One can have as fine a distinction of perceived color as the eye/brain function can decide.
anna v
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