In between, we've got some we perceive green and yellow and orange.
So how do the cones accomplish what they do?
Well, there are three different types of cones and
one of them has has an absorption, or is responsive to light in this area.
So this is a short wavelength cone, it responds to short wavelengths of light.
And then there are two other cones one
of which has a peak about here, and
the other one just a little bit longer.
So this is called the medium wavelength, the medium, or
the M cone, and the long wavelength cone.
So how do we construct vision out of these three cones.
Well, the, we're going to move over to the board and what the,
what's amazing is the, the retina itself.
Before sending information on to the, the rest of the brain, the retina actually
makes three calculations using information from the three different cones.
And I'm illustrating that here.
Let's say that we saw this image.
This is a blue flower or
I perceive it as a blue flower with little red fruits hanging off of it.
Well, we have three channels.
And one channel, it mixes all this input from the medium and
the long wavelength, and we're going to call this the luminance channel.
This is our basic this is the basic form of what we're viewing.