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What do you mean by the term "energy density of radiation "

  1. Feb 28, 2015 #1
    What do you mean by the term "energy density of radiation " between the frequency range f and f +df ????
     
  2. jcsd
  3. Feb 28, 2015 #2

    jtbell

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    Staff: Mentor

    Can you tell us the context or equation where you saw this? There are different kinds of "densities."

    As a wild-assed guess, since you mentioned a frequency range, you are dealing with energy as a function of frequency (e.g. a graph of energy versus frequency), and the "density" means the amount of energy per unit of frequency. But this is only a guess!
     
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