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Homework Statement
Hey guys, I am trying to draw out the electromagnetic absorpton vs frequency graph for a known dielectric constant ε in a medium but I am kind of stucked.
I am studying from the Griffiths' book if you can catch me up from there, equations are on pg. 394, in chapter 9.4 Absorption and dispersion, 3rd edition
Homework Equations
Well, after a long proof, Griffiths concludes that the electromagnetic waves are (not suprisingly);
E(z,t) = E 0 e-κz e i(kz-ωt)
and
B(z,t) = B 0 e-κz e i(kz-ωt)
where κ is the complex part, and k is the real parts of the "wave number"
The Attempt at a Solution
After we all know this given information I just tried to put all the values I know (like the frequency range, ε, σ, etc.) and excluded the imaginary(E) to find absorption. (and then simply plot it on MATLAB.)
Where am I mistaken? I believe I should not simply plot the imaginary part. But what should I do to get a nice Absorption vs frequency spectrum?
Cheers and thank you in prior!