the different colors of light we perceive are a result of the varying frequencies (and wavelengths) of the electromagnetic radiation. infrared radiation has lower frequencies than does visible light, and ultraviolet radiation has higher frequencies than visible light does. the primary colors are red (r), yellow (y), and blue (b). order these colors by their wavelength, shortest to longest. b, y, r r, y, b r, b, y b, r, y
