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Help, not sure?

  1. Feb 13, 2005 #1
    I was given this problem, but I dont know where to start?

    R(v) = dE/dv = (8(pie)(h)(v^3)/ (c^3(e^(hv/kT-1))).
    Recall that if you want the energy per unit wavelength, you cannot
    simply replace the argument v with c/wavelength. Instead you must write
    R(wavelength) = dE/dv = (dE/dv)(dv/d wavelength).

    Evaluate R().

    Any help is appreciated!!
     
  2. jcsd
  3. Feb 13, 2005 #2

    dextercioby

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    You have to replace both the frequency and its differential.

    Daniel.
     
  4. Feb 13, 2005 #3

    dextercioby

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    And the last formula that u've written,it should have been
    [tex]\frac{dE}{d\lambda}=\frac{dE}{d\nu}\frac{d\nu}{d\lambda} [/tex]

    Daniel.
     
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