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2.)energy Density Of Radiations

  1. Jun 20, 2008 #1
    While studying blackbody radiations I was unable to understand the term so used ”ENERGY DENSITY OF RADIATION”. I have heard of density of matter,but how we can define this?
  2. jcsd
  3. Jun 21, 2008 #2


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    If you know the number of photons per unit volume, and each photon carries a particular amount of energy, you now have the amount of energy per unit volume. That's energy density of radiation.

    If you have taken classical E&M, there's a similar definition of energy density for E and B fields.

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