text: Red has the longest. Violet is the shortest.\n \nJust remember the ROYGBIV. Use the splitting of white light into rainbow colors method where light splits up  as white light contains all the seven colors. In this experiment, the red light bends least in the prism while the voilet bends most as it travels slower.\n\nThe longer the wave length the faster it travels and the shorter the wavelength the the slower it travels. Because of this, we can deduce that red has the longer wavelength and violet has a longer wavelength.\n\nSorry, I am not in the right mind. Hope you understand...