PSYC 363 Chapter Notes - Chapter 2: Color Vision, Ganglion, Mach Bands

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A small slice of wavelength in the middle of the electromagnetic spectrum. Electromagnetic radiation: a physical phenomenon that is simultaneously both a wave and a stream of particles. Wavelength: distance between two successive peaks of a wave; Different types of eletromagnetic radiation are defined by their differences in wavelength. Electromagnetic spectrum: the entire range of wavelengths of electromagnetic radiation. A photon is the smallest possible quantity of electromagnetic radiation. Intensity (luminance): amount of light (i. e. #photons) reflected from a surface or emitted by a light source. Can strike a surface and be absorbed disappear into the material of the surface. Strike a surface and be reflected bounce off a surface. Cross a boundary between the air and another transparent medium (e. g. water) Brightness: perceived intensity of the light reflected by a surface or emitted by a light source. Optic array: spatial pattern of light rays, varying in brightness and color, entering the eyes from different locations in a scene.

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