PICTORIAL APPROACH TO MACROSCOPIC SPACE-TIME SYMMETRY, WITH PARTICULAR REFERENCE TO LIGHT-SCATTERING

The physical nature of the constraints imposed on a macroscopic system in equilibrium by space-time symmetry, in order for it to exhibit a particular effect, can be readily determined from a pictorial display of the relevant experiment and of its space- and time-transformed versions. No knowledge is required of the structure of the system, or of the transformation behavior of the property tensors responsible for the effect. The method is illustrated with reference to two known effects in crystals. 29 refs.