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Nine questions were tagged .

Of these seven related to the perceptual values of different frequencies of visible light, and two related to the characteristic charge of the strong nuclear force.

For the time being I have re-tagged the latter as , but I am interested in alternate opinions on the correct tagging. Does perceptual color have a well defined place in physics, and if not should we reserve for the quantum number of the quarks? Or is the casual usage so strongly fixed that we should keep the perceptual tag to avoid confusion for beginners?

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Personally I would be in favor of keeping to refer to the optical concept, mostly because doing otherwise is going to confuse the heck out of a lot of people who aren't familiar with QCD. Also, questions about SU(3) color charge usually can be identified well enough with , although I wouldn't be opposed to keeping around.

(I hope this is not the only answer to be posted)

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