PSYCH 1XX3 Chapter Notes - Chapter 5: Retinal Pigment Epithelium, Optic Disc, Visual Acuity
14 Aug 2020
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Document Summary
1/3 of brain is devoted to processing visual information. When visual info conflicts with another sense, we usually trust our vision. The eye collects, focuses, and senses light stimuli, but that"s just the beginning. Smaller wavelengths have higher frequency, because there is less distance between successive peaks. The greater the amplitude, the more light is being reflected/emitted by object, so the brighter the object appears. Humans can only see from 360-750 nm (violet (shortest wavelength, highest frequency) to red) Bees can see wavelengths shorter than 360 nm (ultraviolet spectrum) Perceive differences in flower colour that look same to us. Snakes can see wavelengths longer than 750 nm (infrared spectrum) They can find prey in the dark by seeing the body heat. Light made of single wavelength is a pure light, and perceived colour is completely saturated. But natural light is usually a combination of many wavelengths, making it desaturated (thus less intense than pure colours)
