PSYCH 1XX3 Chapter Notes -Electromagnetic Spectrum, Visible Spectrum, Retina
Document Summary
The visible spectrum: light = electromagnetic radiation stimulating photoreceptors on the back of the retina, visible spectrum= visible electromagnetic spectrum, 360 750 nano meters. Hue: aka colour, distance between wavelengths, blue, short wavelengths, 360 nanometers, red, long wavelengths, 750 nanometers, able to discriminate over 200 hues. Brightness: level of energy in wave, height of wave/ height of amplitude, higher wave = brighter+ more energy contained, reflects the sum of the responses of all photoreceptors, people are sensitive to 500 steps of brightness. Visual systems can distinguish between at least 2 million colour variations (200 x. Subtractive colour mixing: objects surface reflecting and absorbing particular wavelengths of light, how a colour of an object is perceived, black objects absorb all wavelengths of light on the visible spectrum. Additive colour mixing: combination of wavelengths of light to create hybrid like and new colours, combining all visible wavelengths of light create white.
