# Stefan Boltzman Law

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 \(\large{ \; 5.670373 \;x\; 10^{-8} \; W/m^2/K^4 }\)