Angular Momentum in Quantum Physics,by L.C. Biedenharn and J.D. Louck

An account is given of the Brillouin scattering of light from liquids. Different contributions to the Brillouin spectrum are discussed and are shown to depend on liquid properties such as sound velocity, viscosity, thermal conductivity, structural relaxation and concentration effects. The importance of these measurements to liquid-state theory is emphasized. Stimulated Brillouin scattering is briefly explained. Finally, the use of the Fabry-Perot interferometer in these experiments is discussed.