As I understand what I've read about electron optics, one basically reduces the problem of electron motion to the motion of light in a medium whose index of refraction is different at every point. Such a medium may be described as "inhomogeneous". I could be mistaken but I also have the impression that this inhomogeneous medium is also isotropic, in the sense that at any given point the index of refraction is the same in all directions at that point.
What I would like to know is whether there are any conditions under which electron optics can be described by light in a medium which is possibly still inhomogeneous but but which is anisotropic. If so, please let me know where I can read about it, preferably in books.
Ignorantly, Allan Adler snipped-for-privacy@zurich.ai.mit.edu
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