Stefan Boltzmann constant is a physical constant denoted by Greek letter σ.Which represents constant of proportionality in Stefan - Boltzmann law.
The value of the Stefan–Boltzmann constant is given in SI Units by
σ = 5.670367(13)×10^−8 W⋅m^−2⋅K^−4
In cgs units the Stefan–Boltzmann constant is:
σ ≈ 5.6704×10^−5 erg cm^−2 s^−1 K^−4.
