PSYB51H3 Chapter Notes - Chapter 5: Tetrachromacy, Rhodopsin, Subtractive Color
Document Summary
We want those perceived colours to go with the specific object and not change dramatically as the viewing conditions change. We have 3 types of cone photoreceptors which differ in the photopigment they carry resulting in different sensitivities to different wavelengths. We have only 1 type of rod photoreceptor which peaks at about 500 nm. S-cones: a cone that is preferentially sensitive to short wavelengths; colloquially (but not entirely accurately) known as the blue cone . M-cones: a cone that is preferentially sensitive to middle wavelengths; colloquially (but not entirely accurately) known as the green cone . L-cones: a cone that is preferentially sensitive to long wavelengths; colloquially (but not entirely accurately) known as the red cone . Photopic: referring to light intensities that are bright enough to saturate the rod receptors (that is, to drive them to their maximum responses).
