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Homework Help: Which expansion is used for this result?

  1. Apr 19, 2014 #1
    exp (hv/kT) - 1



    For hv<<kT



    exp (hv/kT) - 1 is approximately equal to hv/kT


    thanks for any ideas.
     
  2. jcsd
  3. Apr 19, 2014 #2

    mfb

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    2017 Award

    Staff: Mentor

    How many expansions do you know?

    exp(x) ~ 1+x should look familiar.
     
  4. Apr 19, 2014 #3
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