Showing papers by "Michael V Berry published in 1978"
TL;DR: In this article, the singularities of the phase of a wave psi in the form of moving lines in space where mod psi mod vanishes are studied for initially plane waves that have passed through a random space and time-dependent phase-changing screen.
Abstract: Wavefront dislocations-i.e. singularities of the phase of a wave psi in the form of moving lines in space where mod psi mod vanishes-are studied for initially plane waves that have passed through a random space and time-dependent phase-changing screen. For transmitted waves that are Gaussian random, incoherent, quasi-monochromatic and paraxial the following quantities are calculated in terms of the statistics of the phase screen: dislocation densities, i.e. the average number of dislocation lines piercing unit area of variously-oriented surfaces, and dislocation fluxes, i.e. the average number of dislocation lines crossing unit length of variously-directed lines in unit time.
110 citations
106 citations
TL;DR: Woodcock and Davis as discussed by the authors proposed a new way of understanding how things change, called Catastrophe Theory, which is the Revolutionary New Way of Understanding How Things Change. Pp. 152.
Abstract: Catastrophe Theory: The Revolutionary New Way of Understanding How Things Change. By A. Woodcock and M. Davis. Pp. 152. (E. P. Dutton: New York, 1978.)
8 citations