PSYB51H3 Chapter Notes - Chapter 5: Circadian Clock, James Clerk Maxwell, Ewald Hering
Document Summary
Colour not a physical property of the world, it"s a creation of the mind. Apparent colour correlated with wavelengths of light rays reaching eye. Some wavelengths absorbed by surface, some reflected: the more wavelength absorbed, the darker the surface will be. Colour depends on mix of wavelengths that reach eye from surface. Colour perception steps: detection: wavelengths must be detected, discrimination: must be able to tell difference between two wavelengths, appearance: we want to assign perceived colours to light surfaces in the world. Want perceived colours to go with the object. Day vision: scotopic: referring to light intensities that are bright enough to stimulate the rod receptors but too dim to stimulate cone receptors. Colour discrimination: principle of univariance: the fact that an infinite set of different wavelength-intensity combinations can elicit exactly the same response from a single photoreceptor. One photoreceptor type cannot make colour discriminations based on wavelength: rods contain rhodopsin.
