PS262 Chapter Notes -Trichromacy, Color Vision, Dichromacy
Document Summary
What are some functions of color vision serves important signaling functions both natural and contrived by humans. Proposal that colour vision may have evolved to determine different fruits for humans and monkeys. We can describe all the colours we perceive by using the terms red, yellow, green, blue and their combinations. Humans can discriminate between about 200 different colours across the length of the visible spectrum. We can create even more colours by changing the intensity to make colours brighter or dimmer by adding white to change the saturation. Perception of white is equal amounts of all wavelenghts across the spectrum. By changing wavelength, intensity and saturation we can create a million discriminable colours. Colour and wavelength colour spectrum stretches from 400nm to 700nm. Mixing lights does not give the same effect as mixing paint. Mixing blue and yellow light gives white light because of the mixes of wavelenghts. Mixing lights is called addictive color mixture.
