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

Use the dispersion relation to find the group velocity v_group and phase velocity v_phase.

2. Relevant equations

omega(k) = [(hbar)k^2]/2m

3. The attempt at a solution

v_group = domega(k)/dk = [hbar]k/m = h/m lambda = p/m = v

This isn't right.

v_phase = omega / k = 2pi f/(2pi/lambda) = f lamda = v

again... is this right?, doesn't look it but as far as I can see there is no mistake in the calc as I have doing it several times already, am I goign wrong in my physics?

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# Dispersion Relation of a De Broglie Wave

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