On the calculation of intensity in dispersive inhomogenous media in the ray approximation
- 8 March 1982
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
- Vol. 380 (1778) , 201-209
- https://doi.org/10.1098/rspa.1982.0037
Abstract
The Hamilton-like equations of geometrical optics determine the rays of the relevant wavefield in the short wavelength limit. It is shown that, by appending a set of subsidiary equations, the associate intensity can be computed along each ray, as the ray itself is traced. The analysis is applicable to any form of wave propagation, and is not confined to optics. It extends to a fully dispersive anisotropic system, some work of P. Ugincius J. acoust. Soc. Am. 45, 193-205, 206-209 (1969) on acoustic propagation (which is not dispersive) in inhomogeneous media.Keywords
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