Geometrical Optics of Inhomogeneous Media

<b>Geometrical Optics of Inhomogeneous Media</b> presents a systematic treatment of geometrical optics, the most effective and widely used method of wave theory. The treatment includes the major developments of recent decades, among them the space-time geometrical optics of dispersive media, the quasi-isotropic approximation, new perturbation techniques for rays, and universally valid limits of applicability.