Light caustics of hydrodynamic solitons illuminated by a laser beam.
Properties of caustics of plane curves are used for interpretation of optical experiments with hydrodynamic solitons in a one-dimensional water channel. The water-free surface acts as a curvilinear plane mirror for incoming light beams. Experiments with single solitons and with couples of colliding solitons are presented and discussed within the framework of geometrical optics.
Da Costa
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