
%0 Journal Article
%A Mullaly, RF 
%T Ray Paths in Inhomogeneous Anisotropic Media
%J Australian Journal of Physics
%D 1962/03/01
%V 15
%N 1
%P 96-105
%K 
%R https://doi.org/10.1071/PH620096
%U https://www.publish.csiro.au/paper/PH620096 
%X The paths of rays in inhomogeneous anisotropic media are studied, starting from Fermat's Principle of Stationary Time. The media considered have a refractive index which depends on the angle between the direction of propagation and an axis of symmetry in the medium, and on several scalar parameters; both these and the direction of the axis are functions of position. Expressions are developed for the curvature of a ray path and are applied to (a) radio rays in an ionized medium pervaded by a non-uniform magnetic field and (b) acoustical rays in a moving fluid. 
