acronym for physics

raging martians invaded venus using ray guns (R.M.I.V.U.R.G.) is a mnemonic device to help remember key concepts in electromagnetic spectrum
it sorts from low frequency and energy to highest frequency and energy and the other way shows high to low wavelength. also include roygbiv and the wavelength approximately from 400 to 700 nm with v being smallest wavelength and the corresponding colors of the visible light spectrum: Red, Orange, Yellow, Green, Blue, Indigo, and Violet, where Red has the largest wavelength and Violet has the smallest.