(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the group velocity of the wave [tex]f(x) = cos(b\sqrt{\omega}x - \omega t)[/tex]

2. The attempt at a solution

What? I thought group velocity was an interference phenomenon...The velocity of the beats produced when two waves with slightly different frequencies interfere. What is meant by the group velocity ofonewave?

Anyway, I know that [tex]v_{g} = \frac{d\omega}{dk} = \frac{d(k^{2}/b^{2}}{dk} = 2v[/tex] which is the correct answer. I still don't understand what I've found however...

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# Homework Help: Group velocity of single wave?

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