PSY280H1 Study Guide - Mach Bands, Limulus, Belongingness
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PSY280H1 Full Course Notes
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Electromagnetic spectrum: continuum of electromagnetic energy that is produced by electric charges and is radiated as waves. Wavelength: distance between the peaks of the electromagnetic waves. Wavelengths in the electromagnetic spectrum ranges from extremely short-wavelength gamma rays to long wavelengths radio waves. Visible light: energy within the electromagnetic spectrum that humans can perceive, has wavelengths ranging from about 400 to 700 nm. For humans and some other animals, the wavelength of visible light is associated with the different colors of the spectrum. Although we will usually specify light in terms of its wavelength, light can also be described as consisting small packets of energy photons. Light reflected from objects in the environment enters the eye through the pupil and is focused by cornea and lens to form sharp images of the objects on the retina: contains receptors for vision. Rods and cones contains light-senstive chemicals called visual pigments. They react to light and trigger electrical signals.
