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Homework Help: Blackbody radiation and stefans constant

  1. Apr 30, 2005 #1
    What is the rate of energy radiation per unit area of a blackbody at a temperature of 260K ?

    Where's the tricky part in this question?

    Surely the answer to this question can't be just

    stefans constant * T^4

    ie. 5.67x10^-8 * 260^4 = 259.105 W/m^2
  2. jcsd
  3. Apr 30, 2005 #2


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    Not every problem is tricky. The hard work was done to derive the constant. If you had been asked to that, it would be a whole different thing.
  4. Apr 30, 2005 #3
    That's the question. Nothing else was asked.

    What confuses me is how it says ...per unit area...in the question. So I'm thinking maybe they want some other number, I'm not sure
  5. Apr 30, 2005 #4


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    What's the definition of Stefan-Boltzmann's constant...?

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