Why are black and white often not counted as colors?
In: Physics
It’s an interesting question this. It seems to be a kind of overcorrection based on the idea that “colour” refers to a position on the spectrum of light. White isn’t a colour here and neither is black, one being a mix of visible wavelengths, the other an absence of light.
It’s a strange position to take to me. Why should mixing all colours equal no colour? We talk about “black and white” images, but not “black and white and colour” images. If someone asked “what colour pen do you want?” you wouldn’t go “I want the no colour pen.”
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