PSYCH 1XX3 Chapter Notes -Visual Acuity, Two-Streams Hypothesis, Thalamus
28 Feb 2014
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Document Summary
The ability to see colour gives us an advantage to detect predators and prey against a background. Subtractive colour mixing: applies to the mixing of pigments, dyes, or paints and it is called subtractive" because every surface colour absorbs (or subtracts) the colours it does not reflect. Adding other pigments to the surface alters the combination wavelengths subtracted: the complementary colour of red was green; for yellow it was purple; and blue it was orange. If a primary colour is mixed with its complementary colour you get brown: summary: involves a combination of pigments reflecting the sum of wavelengths that are not absorbed. Both theories needed to explain colour perception: hurvich and jameson elaborated the theories and proposed that, there are three component receptors or cones in the retina that are maximally responsive to light of a certain wavelength (trichromatic theory). The three cones are maximally responsive to red, green, and blue.
