One Answer

  1. On our retina there are receptors-special cells that perceive light, just the same electro-magnetic waves of a certain length. There are 4 types of them – 3 types of cones and rods. Sticks work in low light conditions, they are more at the edges of the retina, which begins to work when the pupil expands. In the center there are cones, they work in good light, for example, during the day. They are responsible for the perception of color. There are three types of cones: S-type cones perceive blue-violet light (wavelength 420-440 nm) , M-type cones perceive green — yellow light (564-580 nm), and L-type cones perceive yellow-red light (534-545 nm). If several cones are located nearby and perceive light at once, we perceive color mixing, and if all three types of cones work, the color seems lighter to us. Remember an experiment from physics where rays of 3 colors overlapping dat white lighting? This mechanism is reflected in the RGB (Red, Green, Blue) color rendering model. In fact, each cell translates its wavelength into an electrical pulse, in 1 of the 3 basic colors, and then these pulses add up.

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