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Homework Help: Help with an approximation

  1. Feb 10, 2004 #1
    I'm doing a problem on Van-der Walls interaction and was told in the hint of the problem to use the approximation kT>>hw to simplify

    {-hw/(2kT)}-Ln[Exp[-hw/(kT)]-1]

    I have no idea how to apply this approximation to simpify the problem.
    Thanks
     
  2. jcsd
  3. Feb 10, 2004 #2

    Hurkyl

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    Do you remember differential approximation? (Or taylor series?) If kT >> hw, then (hw / kT)^2 is going to be negligibly small...
     
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