[題目] 自由電子的群速度
[領域]近代物理
[來源]課本習題
[題目]
Show that the group velocity for a nonrelativistic free electron is also
given by Vg=P/Me=Vo,where Vo is electron's velocity
[瓶頸]
有點不知道該如何下手,只寫到了dW/dk = 1/h*dE(k)/dk就卡住了
請求提點!感謝
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