# What is Stefan Boltzmann law?

The Stefan-Boltzmann law is $L = A \sigma {T}^{4}$, where:
• $A$ = surface area (${m}^{2}$)
• $\sigma$ = Stefan-Boltzmann (~5.67*10^-8Wm^-2K^-4)
• $T$ = surface temperature ($K$)