1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Blackbody Radiation Test Question

  1. Oct 30, 2012 #1
    1. The problem statement, all variables and given/known data
    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.

    2. Relevant equations
    Maybe dE=TdS-PdV being the fundamental state?

    3. The attempt at a solution
  2. jcsd
  3. Oct 30, 2012 #2
    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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook