Coupled‐amplitude equations are used widely to analyze problems involving wave propagation. The free‐space Green’s function can be used to advantage to show that these equations emerge naturally from the wave equation. The procedure for obtaining the coupled‐amplitude equations is an instructive one that will likely prove a useful addition to the list of examples of the practical utility of Green’s functions.
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© 1993 American Association of Physics Teachers.
1993
American Association of Physics Teachers
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