what is description of light
Light does not have a color. An object absorbs light of all sorts of frequencies, but will re-emit some of these frequencies. Those that happen to be in the visible spectrum will ultimately be absorbed by the cones in our eyes. There are three types of cones, long, medium, and short and they correspond to a certain range of frequencies of light in which they 'specialize' in the absorption of. The peak absorptions for the three cones are perceived by our brains to be associated with the general colors red, blue, and green-- the primary colors. When the brain perceives data from light absorbed by all three cones, the brain begins to distinguish between the different shades and hues and refine the color. Your brain is using colors to distinguish between the various frequencies your cones absorb, the light itself doesn't have a color.
The colors of the rainbow are all different parts of the spectrum. Meaning, light is the color of any and/or ALL of the colors that are visible to the human eye.
Red green and blue are are the primary colours of light
