# Heat Radiation

Heat radiation, abbreviated as P, one of three ways to heat transfer: conduction, convection and radiation) is the flow of energy through electromagnetic waves such as infrared, light, microwaves, etc.

### Heat Radiation formula

\(\large{ P = \epsilon \; \sigma \; A \left( T^4 - T_e^4 \right) }\)

Where:

\(\large{ P }\) = heat radiation

\(\large{ \epsilon }\) (Greek symbol epsilon) = the emissivity of the particular body and is a number between 0 and 1

\(\large{ A }\) = radiating area

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

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

\(\large{ T_e }\) = temperature of the environment

Tags: Equations for Heat