PSY 2104 Lecture Notes - Lecture 5: Trichromacy, Human Eye, Dioptre

• School: Temple University
• Department: Psychology
• Course: PSY 2104
• Professor: Professor Smith

Document Summary

Outline: basic properties of color, perceiving color, extensions of color vision. What is it good for: segmenting predator, prey from background (natural selection, selecting ripe fruit (natural selection, advertising and evaluating fitness (sexual selection) Find the faces: without color cues, hard to detect objects. James clerk maxwell was most influential physicist since newton (at least according to. Color detection: three color receptors (ch 2), highly concentrated in fovea, peak actually violet, green and yellow, each very broad range of sensitivity. Red and green cones have very similar response, but blue is very different. One would expect an optimal design would have a lot of blue cones to provide better color: yet blue receptors very rare. No need for lots of them: advantage of seeing the world with rose/orange colored glasses (blue blockers): block blurry blues. Color detection: s-cones- peak 420nm, m-cones- peak 535nm, l-cones- peak 565nm, rods -498nm, not sensitive to light, red cockpit lights.