A rainbow is a good demonstration of the imperfections in human visual processing -- where we see a series of bands of color is actually a smooth gradient (or ramp) of lengthening wavelengths of light.
copyright (c) 2016
William Schaeffer
Saturday, November 26, 2016
Bands of color in a Rainbow
We have two cones, a red-green cone and a blue-yellow cone. The way these interact produce 6 bands, or stripes, of color in a rainbow. The color response of the retina is not linear and it is corrected for by the brain in ordinary scenery. Only in extreme cases do we see the flaws (like in a rainbow which is actually a smooth linear gradient of electro-magnetic radiation). The bands of color in a rainbow exposes the flaws, or imperfections, in our vision. But it still looks nice.
A rainbow is a good demonstration of the imperfections in human visual processing -- where we see a series of bands of color is actually a smooth gradient (or ramp) of lengthening wavelengths of light.
A rainbow is a good demonstration of the imperfections in human visual processing -- where we see a series of bands of color is actually a smooth gradient (or ramp) of lengthening wavelengths of light.
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