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Differing formulae for power emission

  1. Sep 5, 2008 #1
    Last edited by a moderator: Apr 23, 2017
  2. jcsd
  3. Sep 6, 2008 #2


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    pi? i ate it!

    Hi PatF! :smile:

    (have a pi: π :smile:)

    In wikipedia, the units are "spectral radiance", which involves watts per square metre per unit solid angle

    but in hyperphysics it's watts per cubic metre. :wink:
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