Why do TV's and monitors use red, green, & blue instead of red, blue, and yellow?
by 
jacyschroeder
ANSWERS: 2
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TV monitors and other similar devices use the three primary ADDITIVE colours: red, blue, and green. Colours are formed by adding various combinations of these three colours to produce any other colour, for example: - Red + Blue = Magenta. - Blue + Green = Cyan. - Green + Red = Yellow. Using yellow in place of one of the primary additive colours would produce a hole in the colour spectrum produced by that device, because it would be unable to produce the entire spectrum using two primary colours and one secondary colour. See http://www.rgbworld.com/color.html for a detailed description of colour systems.
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Red blue and yellow are the primary colors of PIGMENT (paints, dyes, etc.) Red blue and green are the primary colors of LIGHT (that which reflects off the above colors are are produced by sources such as in your TV screen or computer monitor) Your eyes have three color-sensing cells: cones that are sensitive to red, blue or green light. When light reflects off an object, the wavelength of light that bounced off that certain color pigment enters your eye and stimulates whichever cone(s) are sensitive to that wavelength. Your brain interprets color based on which cones are stimulated how much. Red and green light makes yellow. (Or yellow light reflected off a yellow object stimulates the red and green cones)
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