On 9/5/07, Peekee <[EMAIL PROTECTED]> wrote: > Ow I wanted to do that... Also there are some tetra-chrome humans who > can see 4 colours. There are actually an infinite number of real > colours (combinations of differing strengths of wavelengths) for any > colour we can perceive. So technically there are an infinite number of > different greens that are indistinguishable by the human eye.
Along these lines, http://www.4colorvision.com/files/tetrachromat.htm is also an interesting read: the claim is that all humans are tetrachromats, but that one of our color receptors is blocked by the lens. -root
