New answers tagged models
5
The problem with the cancelling you suggested is that it is imposed globally for the PDE and not locally (just on the thin layer).
Usually when we talk about vertically layered media we use a plane wave $\exp(i(\mathbf{k}\cdot\mathbf{x}-wt))$ trial solution (you can plug this in to confirm that it satisfies the PDE) and match boundary conditions at the ...
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