 This diffraction pattern corresponds with a conventional diffraction grating at angles formula_16 from the original direction, and is given by,

where formula_18 is the wavelength of the optical wave, formula_19 is the wavelength of the acoustic wave and formula_20 is the integer order maximum.Light diffracted by an acoustic wave of a single frequency produces two distinct diffraction types.These are Raman-Nath diffraction and Bragg diffraction.