Frequency Versus Wavenumber
As mentioned above, when the focus in a medium is on refraction rather than absorption—that is, on the real part of the refractive index—it is common to refer to the functional dependence of frequency on wavenumber as the dispersion relation. For particles, this translates to a knowledge of energy as a function of momentum.
Read more about this topic: Dispersion Relation
Famous quotes containing the word frequency:
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—Jean Marzollo (20th century)