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Propagation of Electromagnetic Waves in Media Which Vary Slowly With Position and Time
Author(s) -
Fante Ronald L.
Publication year - 1972
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs007i012p01153
Subject(s) - physics , position (finance) , electromagnetic radiation , isotropy , wkb approximation , wave propagation , group velocity , computational physics , spacetime , radio wave , classical mechanics , optics , quantum mechanics , finance , economics
Using WKB methods we have considered the propagation of electromagnetic waves in isotropic lossless media which vary slowly with both position and time. It is found that in such media the meaning of various quantities, such as the group velocity, must be reinterpreted. The theory is applied to study propagation in space‐time, varying dielectrics, and plasmas.