- #1
ian2012
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In general the electronic susceptibility, χ, is a function of frequency and is complex for a dielectric medium.
So what are the implications of this for the propagation of EM signals in a dielectric medium?
Since the electronic susceptibility varies with refractive index, and the refractive index varies with wave number k, then the wavenumber is also complex - so it has an imaginary component. What does this mean in terms of wave propagation (phase shift with frequency)?
So what are the implications of this for the propagation of EM signals in a dielectric medium?
Since the electronic susceptibility varies with refractive index, and the refractive index varies with wave number k, then the wavenumber is also complex - so it has an imaginary component. What does this mean in terms of wave propagation (phase shift with frequency)?