| Stefan-Boltzmann Law
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The Stefan-Boltzmann law states that the emissive power (E) from a black body is directly proportional to the forth power of its absolute temperature (T). |
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i.e. E = σ x T4 |
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Where, σ = Stefan-Boltzmann constant = 5.67E-8 W / ( m2 K2 )
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The law was experimentally discovered by Jozef Stefan ( 1835-1893
) in 1879 and theoretically derived in the frame of the thermodynamics
by Ludwig Boltzmann ( 1844-1906 ) in 1884. |
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The emitted power (E) for a non-black body with emissivity (ε) is
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E = ε x σ x T4 |
