APPENDIX D
Wave Equations
The propagation of electromagnetic waves is governed by the following Maxwell’s equations:
(D.1)
(D.2)
(D.3)
(D.4)
Here, ρ is the charge density, and J is the current density. We assume that there are no free charges in the medium so that ρ = 0. For such a medium, J = σE, where σ is the conductivity of the medium. Since ...
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