Blackbody Radiation Test Question

  • Thread starter cstang52
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  • #1
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Homework Statement


The blackbody radiation equations of state are E/V=aT^(4) and P=(1/3)(E/V). From the fundamental state derive a quantity involving only P and V that remains constant when this radiation undergoes a reversible adiabatic transformation.


Homework Equations


Maybe dE=TdS-PdV being the fundamental state?

The Attempt at a Solution

 

Answers and Replies

  • #2
196
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I suggest starting with
[tex]dE = -p \; dV[/tex]
since for an adiabatic process dS = 0. Then try to eliminate dE in favor of dp and dV.
 

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