Group velocity of a wave

  • #1
ReidMerrill
68
2

Homework Statement


The group velocity of a wave is given by the equation
Vg = dv/d(1/λ)
Prove that the group velocity of a de Broglie particle wave is equal to the ordinary velocity of the particle. Assume the potential energy is equal to zero


Homework Equations


v=h/λ
λ=h/mv

The Attempt at a Solution


I don't know how to start this. None of this was covered in lecture. Any help would be greatly appreciated
 

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