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Isothermal Compressibility of Photon Gas

  1. Oct 25, 2015 #1
    I am really stuck at this question.

    I tried to get the equation of volume with independent variables P and T, but the equation itself does not give a nice form, and thus I cannot get the derivative of V with respect to P. What should I do?
  2. jcsd
  3. Oct 25, 2015 #2


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    2017 Award

    Staff: Mentor

    What is the non-nice equation you got?
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