We are asked to substitute a plane wave solution into the TDSE for V=0 and show that it satisfies the TDSE (this is straightforward). Does this mean the plane waves are only solutions to the TDSE if V=0, or do they have other significance?(adsbygoogle = window.adsbygoogle || []).push({});

Also we show that the group velocity = v (the particle velocity) and that the phase velocity =v/2. The calculations are straighforward but the interpretation is difficult. I can see why the group velocity (the effective speed of the wave packet and the speed at which information is propogated) = v, but I can't see why the phase velocity = v/2.

Thanks

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# Homework Help: Plane waves

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