Entropy of blackbody radiation

learningphysics

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Can someone point out any information (derivation or where it comes from) about this equation:

[tex]S = v\int_0^\infty\phi(\rho,\nu)d\nu[/tex]

[tex]\nu[/tex] is frequency of radiation. [tex]\rho(\nu)[/tex] is radiation energy, v is volume.

I'm getting this from Einstein's photoelectric effect paper.

Thanks a lot!
 
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dextercioby

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Well,i haven't seen it in this actual form.Surely it wasn't an invention by Einstein.Did you check the formula for the entropy of BB radiation in a standard SM textbook,like Schwabl or Greiner...?Can u see the connection,then ?

Daniel.
 

learningphysics

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No. I haven't studied statistical mechanics (beyond very basic ideas of entropy), and don't have a text to compare.

I figured I'd probably need to have a good understanding of statistical mechanics before I could get through this paper. :yuck:

edit: Which SM text would you recommend?
 
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dextercioby

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Greiner's book in his series seemed accessible / readable enough and provided a wealth of worked out examples.

Daniel.
 

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