Re: scattering vs. absorption

saburq@xxxxxxxxx wrote:

> Don't understand why the Absorption ocurrus at Higher wavelengths
> (4mm - 20mm) while the scattering influences largely the shorter
> wavelengths?

If you know complex numbers, the explanation is that the scattering is
due to the real part of the dielectric constant, and the absorption to
the imaginary part. The are related by Kramers-Kronig transforms.

This is a mathematical representation of the behavior of driven
oscillators: the absorption (dissipation) is due to the response that is
in phase with the driving field, the scattering is due to the component
of the motion that is 90 degrees out of phase with the driving field.

Something about the Lorentz oscillator:
http://webphysics.davidson.edu/Projects/AnAntonelli/node5.html

--
"Electrons damage the brain," said Farish. (Donna Tartt)
.

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