Posted: Feb 26, 2016 7:12 pm
by DavidMcC
romansh wrote:Scholastic
I don't have a problem with your physics perhaps incomplete... but you are describing the concept of what colour is ... the bus is not red, our experience of it is.
Exactly where are the yellow photons in this image?

Romansh, why would there have to be any "yellow" photons, when your LW (red) and MW (green) cone cells can be equally stimulated with a spectrum which has only, say red and green photons, or a whole range of mixtures that happen to give the same cone cell response as monochromatic yellow?

EDIT: BTW, a trichromat sees yellow when his/her LW and MW cones are equally stimulated. It is the brightest colour in the rainbow, because those two cone cell response curves have a strong overlap, being quite close in wavelength. (I posted more detail on this subject a while back.)