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Violet is a real wavelength, below blue on the spectrum. Where it becomes invisible to the human eye, it starts getting called ultraviolet. Magenta and purples
by carlosjobim 2y ago
Violet is a real wavelength, below blue on the spectrum. Where it becomes invisible to the human eye, it starts getting called ultraviolet.
Magenta and purples are constructs by the brain, as you mention.
- subb 2y agoNo, they are all constructed, including blue. If I shine some wavelength to your eyeball and you say "it looks blue", but then I change the surrounding and now it looks white, I don't think you would conclude that the original wavelength is blue. We have a many examples like this, which prescribe that vision is not at all an accurate wavelength measurement device.