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Homework Help: Group Velocity

  1. Aug 21, 2009 #1
    1. The problem statement, all variables and given/known data

    Show that:


    3. The attempt at a solution


    ...Yeah, I have no clue. [tex]\omega[/tex], [tex]\lambda[/tex] and c are all functions of each other, and i'm confused :(.
    Last edited: Aug 21, 2009
  2. jcsd
  3. Aug 21, 2009 #2
    Nevermind, solved it. I was really close, I just made a stupid mistake with my algebra.
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