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2008 Reflection of various types of waves by layered media
Sergiy Mokhov, Boris Zeldovich
Commun. Appl. Math. Comput. Sci. 3(1): 61-75 (2008). DOI: 10.2140/camcos.2008.3.61


The one-dimensional wave equation describing propagation and reflection of waves in a layered medium is transformed into an exact first-order system for the amplitudes of coupled counter-propagating waves. Any choice of such amplitudes, out of continuous multitude of them, allows one to get an accurate numerical solution of the reflection problem. We discuss relative advantages of particular choices of amplitude.

We also introduce the notion of reflection strength S of a plane wave by a nonabsorbing layer, which is related to the reflection intensity R by R= tanh2S. We show that the total reflection strength by a sequence of elements is bounded above by the sum of the constituent strengths, and bounded below by their difference. Reflection strength is discussed for propagating acoustic waves and quantum mechanical waves. We show that the standard Fresnel reflection may be understood in terms of the variable S as a sum or difference of two contributions, one due to a discontinuity in impedance and the other due to a speed discontinuity.


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Sergiy Mokhov. Boris Zeldovich. "Reflection of various types of waves by layered media." Commun. Appl. Math. Comput. Sci. 3 (1) 61 - 75, 2008.


Received: 14 March 2008; Revised: 30 May 2008; Accepted: 30 May 2008; Published: 2008
First available in Project Euclid: 20 December 2017

zbMATH: 1180.76055
MathSciNet: MR2425546
Digital Object Identifier: 10.2140/camcos.2008.3.61

Primary: 34B05, 76Q05, 78A25, 81Q05

Rights: Copyright © 2008 Mathematical Sciences Publishers


Vol.3 • No. 1 • 2008
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