PSYB51H3 Study Guide - Opponent Process, Subtractive Color, Lateral Geniculate Nucleus
Document Summary
Some wavelengths are absorbed by the surfaces they hit, the more light that is absorbed, that darker the surface will appear. Color of a surface depends on the mix of wavelengths that reach the eye from the surface. Color is the result of the interaction of physical stimulus with a particular nervous system. Light is differentially absorbed by three photo pig- ments in the cones. Discrimination: must be able to tell the different between one wavelength and another differ- ences are taken between cone types, creating cone-opponent mechanisms, important for wave- length discriminations. Appearance: want to assign perceived colors to lights and surfaces in the world. Want perceived colors to go with the object and not to change dramatically as the viewing conditions change. Further recombination of the signals creates color-opponent processes that support the color-op- ponent nature of color appearance. S-cone: a cone that is preferentially sensitive to short wavelengths; known as blue cone .
