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Magnify your image. I just put it in GIMP and it is clear that there are several pixels in the red and the blue near the border which are a darker color than those adjacent - the drawing program must be responsible. Lateral geniculate nucleus That said, differences of red and green hue are handled more in the parvocellular layers of the LGN, while grayscale ...


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Color is a characteristic of visible electromagnetic spectrum, see the graph here. Electromagnetic means here that it has the same nature as radio-waves, X-rays, and gamma radiation, whereas visible refers to the region of spectrum - waves of frequencies ranging from TeraHertz to PetaHerz (i.e., from $10^{12}$ Hz to $10^{15}$ Hz). Specific colors essentially ...


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There are several combined reasons. first salt itself in such lakes is often pink, so part of the color comes from the salt crust itself. this is more noticeable in more extreme salt lakes where the deposits can be quite thick. It can be due to iron impurities but can also be further dyed by trapped carotenoids in the salt as it is deposited. Part is also ...


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