Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.

yellowgold · 2008-11-01 08:26:15

My question is related to wavepackets . For example there is a wave packet and we know lattice constant and wavelength of it. How we can determine group velocity of it. And how we understand how fast it will spread out ?

And

If we consider free electrons in vacuum
How we can determine momentum, energy or velocity of wave ?

Astro · 2010-05-04 02:11:30

The group velocity is given as $\frac{\partial \omega}{\partial k}=\frac{\partial E}{\partial p}$ . E is the energy, p is the momentum, w is the angular frequency and k is the wavenumber.

Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.

#1 2008-11-01 08:26:15

wavepackets

#2 2010-05-04 02:11:30

Re: wavepackets

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