PSL300H1 Lecture Notes - Lecture 23: Color Vision, Color Constancy, G Cell
Document Summary
Colour and photoreceptors: processing colour, colour blindness, colour constancy. This lecture was given online via a video link on blackboard. Wavelength: distance from one wave peak to the next. Wavelengths we see range from 400 nm (violet) to 700 nm (red) This is our range bc power of sunlight peaks here and bc earth"s atmosphere is most transparent to these wavelengths (hence evolution kept this range) Sea water, where eyes first evolved, is most transparent < 500 nm. We can see powerful infrared and some can see uv if lenses removed (like in cataracts) But visible range is a tiny portion of electromagnetic spectrum. People who have seen these colours just say that it looks like an extension of what"s there. Infrared in very high amounts can be seen to some extent. Three cones are: red (r; 63%), green (g; 31%), blue (b; 6%)
