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A general variational principle for thermal insulation system design

✍ Scribed by Adrian Bejan

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
884 KB
Volume
22
Category
Article
ISSN
0017-9310

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A variational principle for light rays in a general-relativistic plasma
✍ Volker Perlick πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 626 KB

We consider ray optics in a non-magnetized plasma on an arbitrary general-relativistic spacetime. We discuss a variational principle for light rays traveling, under the influence of the plasma, from a point \(x\) to a timelike curve \(\gamma\) and arriving at \(\gamma\) with a prescribed frequency.