PSC 131 Lecture 9: Lecture9_Color
Document Summary
Class summary: color and light, color mixing: lights vs. paints, color detection cones, color discrimination. 10/30/17: color and light, color signals help us classify and identify objects, color and light. Color facilitates perceptual organization of elements into objects. Color vision may provide an evolutionary advantage in foraging for food. Glass prism http://commons. wikimedia. org/wiki/file:light_dispersion_conceptual_waves. gif http://www. alaska-in-pictures. com/rainbow-over-the-muldrow-glacier-1128-pictures. htm: color and light: visible spectrum short long violet blue green yellow orange red. 10/30/17: color and light: how do we perceive color, actually there are no colors out there in the world. Color is not a physical property but a psychophysical property: color perception is due to our sensory interpretation of information in the electromagnetic spectrum we interpret different wavelengths as different colors. Infrared spectrum in range of 1000 100,000 nm. 10/30/17: color and light: ultraviolet vision, calla lily http://dpfwiw. com/flowers. htm#uv, color and light: infrared vision. Nasa/jpl: color and light: light interacts with matter, chromatic colors or hues - objects that preferentially reflect some wavelengths.
