Stefan-Boltzmann Law calculates the radiation energy of a subject surface. All objects with temperature above absolute ZERO radiate energy.
The Stefan-Boltzmann equation is:
P = εAσT4
Where:
P: Radiation Energy
ε: Emissivity of the Surface. Check emissivity table below of common materials.
A: Surface Area, in m^2.
σ: Stefan-Boltzmann Constant, σ=5.67 × 10-8 W/m2•K4
T: Absolute Temperature
Emissivity Table of Common Materials (Click to add)
Name
Temperature ( ̊C )
Emissivity
Wood (Oak, Planed)
38
.91
Glass, smooth
0-93
.92-.94
