Stefan Boltzman Law

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Stefan Boltzman law states that the total energy radiated from black body radiation that is emitted by a surface is porportional to the fourth power of its absolute temperature.

Stefan Boltzmann Law Formula

$$\large{ P = \epsilon \; \sigma \; T_a^4 \; A }$$

Where:

$$\large{ P }$$ = radiate energy

$$\large{ T_a }$$ = absolute temperature

$$\large{ A }$$ = area of the emitting body

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

$$\large{ \sigma }$$  (Greek symbol sigma) = Stefan Boltzmann Constant

Stefan Boltzmann Constant

Stefan Boltzman Constant, abbreviated as $$\sigma$$, also called Stefan Constant, has a value of $$\large{ \; 5.670373 \;x\; 10^{-8} \; W/m^2/K^4 }$$