A model is proposed to compute the salient optical caustic partitions occurring in the primary
rainbow for oblate spheroidal drops. By computing the boundary limits of outgoing rays, the …

Experiments on radiation torques and negative radiation forces by various researchers
display how the underlying wave-field geometry influences radiation forces. Other situations …

Various groups have reported observations of hyperbolic umbilic diffraction catastrophe
patterns in the far-field scattering by oblate acoustically levitated drops with symmetric …

Sound incident on the sea bottom at small grazing angles can produce acoustical
evanescent waves in the sediment. The objective of this project was to describe the …

Wavefields associated with caustics may be classified and analyzed by applying the
methods of catastrophe theory to the relevant ray singularities. Some recent examples from …