Quote:
Originally Posted by Jeff Root
They sure will. I'm sure you have a graph of human color sensitivity
at hand. Preferably one that doesn't normalize the peaks. You can
see that even the red and blue have a great deal of overlap. Only
the relative rate of stimulations in the different cones enables the
signal procesing mechanisms in the eyes to distinguish different
colors, when a sufficiently large number of stimulations occur.
-- Jeff, in Minneapolis
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It's not about two types of cones having overlap. The question is whether "blue" cones have any response to light at, let's say, 650 nanometers wavelength. I don't have a non-normalized graph available, but many normalized graphs I've seen don't show S (blue) cones having any relative sensitivity for light at red wavelengths; the S cone sensitivity seems to fall off at 550 nanometers. But then again, those graphs are pretty inexact and normalized so I can't say either way. Hope someone has better info on this.