PSY280H5 Lecture Notes - Lecture 7: Electromagnetic Spectrum, Red, Color Vision
Document Summary
Colour makes us focus on different features of the environment. People would add a bit of red this indicated health colour signals help us classify and identify objects colour vision may provide an evolutionary advantage in foraging and mate selection. Different frequencies of light are associated with different phenomenon"s, shorter wavelength = more blue, as the wavelength increases we start to see reds. We only see a few 100nm, so there is a lot of energy in the electromagnetic spectrum that is completely invisible: some animals can see different parts of the electromagnetic spectrum (i. e. uv) Hue: hue = wavelength that correspond with our perception, we can detect approximately 200 different hues, though we may not have a colour for that. Saturation: more wavelengths added = more saturation (= looks more grey, we are sensitive to 20 different levels of saturation (200x20)
