Abstract
We have already used the concepts of phase and group velocity for waves as they are well-known from the course in general physics. In simple situations no additional explanation would be necessary. However when the medium is active and contains variable parameters, the propagation velocity of waves requires extra consideration [1–4].
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© 1989 Kluwer Academic Publishers
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Rabinovich, M.I., Trubetskov, D.I. (1989). Propagation Velocity of Waves. In: Oscillations and Waves. Mathematics and Its Applications (Soviet Series), vol 50. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1033-1_8
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DOI: https://doi.org/10.1007/978-94-009-1033-1_8
Publisher Name: Springer, Dordrecht
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