Heat Radiation

Written by Jerry Ratzlaff on . Posted in Thermodynamics

conduction convection radiantHeat 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

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


\(\large{ P }\) = 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