I've been working on problems trying to find the dispersion relation of monatomic and diatomic chains. I'm able to find the dispersion relation, but I don't really understand what it is. I'm pretty sure that it's the relation of the frequency to the wave vector.(adsbygoogle = window.adsbygoogle || []).push({});

I'm working through Kittel's Intro to Solid States, and it states that the wave vector is simply 2Pi/wavelength. I'm wondering where the wavelength comes from though. Is that the wavelength of the wave propagating through the crystal lattice? Could someone please explain?

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# Dispersion Relation and wavelength

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