Stefan-Boltzmann Law

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Stefan-Boltzmann law describes the power radiated from a black body, an ideal black surface that absorbs all radiant energy falling on it, in terms of temperature.

Stefan-Boltzmann Law formula

\(\large{ P =  \epsilon \; \sigma \; A \; T^4  }\)


\(\large{ P }\) = radiated energy

\(\large{ T }\) = absolute temperature of the object emitting

\(\large{ \epsilon }\)  (Greek symbol epsilon) = emissivity of the material

\(\large{ A }\) = radiating area 

\(\large{ \sigma }\)  (Greek symbol sigma) = Stefan-Boltzmann constant

Stefan-Boltzmann constant

\(5.670367 \;x\; 10^{-8} \; kg \; s^{-3} \; K^{-4} \)


Tags: Equations for Heat