PSYCH 1XX3 Study Guide - Final Guide: Retinal Pigment Epithelium, Optic Disc, Vitreous Body
10 Jul 2018
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Document Summary
Variations in amplitude affect the perception of brightness. Greater amplitude of light wave = more light being reflected or emitted by the object (appears brighter / more intense) Variations in wavelength affect the perception of colour. Measured in nanometers (millionths of a millimetre) Smaller wavelengths have higher frequency, since there is less distance between peaks. Humans are only sensitive to a tiny portion (the visible spectrum; 360-750) of the total range of wavelengths of electromagnetic radiation. Other species can see light outside our visible spectrum. Insects like bees can see <360 nm (can perceive differences in colours that look the same to us) Snakes can see >750 nm (see body heat) Purity affects the perception of the saturation, or richness, of colours. Light made of a single wavelength is pure light, and the perceived colour is described as completely saturated (vs desaturated, which is a combination of many wavelengths) Light passes through the curved cornea, which begins the focusing process.
