Re: is anything white?

Ben Goren wrote:

reaching our eyes. After all, that's pretty much how the mechanics of our eyes work: a photon hits one of the photoreceptors in the eye, and that creates an electrochemical impulse in the optic nerve associated with the location and color of the photoreceptor. The more photons in a shorter amount of time, the stronger the nerve signal.

Actually, the adaptation starts happening right in the photo-receptor. That's why if you stare at one image for a length of time, you get an after image when you eventually move your eyes. Our white point adaption can largely be explained as the consequence of this "automatic gain control" of each receptor cell type (short, medium, long). Graeme Gill.