We consider theoretically the scattering of coherent radiation by a rough surface that is subjected to small perturbations in the form of transverse traveling or standing waves. It is shown for a special geometry of the illumination of the diffuse scatterer in the form of two spots, that the intensity distribution in the observation plane constitutes a characteristic "spotted" picture modulated by a system of Young's interference fringes. The presence of the perturbation leads to vibrational motion of the fringe system. This phenomenon can be used to observe and study vibrations of rough surfaces.
Кафедра общей физики для мехмата
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