# What Do You Think About That A 1879 Stefan's Law Be Used To Calculate Star Radius Or Temperature?

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### #1 rhertz

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Posted 29 April 2019 - 11:11 PM

As used at astrophysics, Stefan's law is expressed as:

L = 4 π R2 σ Τ 4

L: Luminosity (in Watts)

T: Star's surface temperature.

It's derived from the Stefan's formula, used priorly to calculate the star temperature:

j = 𝜎T4

where j is the Iradiance or Flux Density (Watt/m^2), which is estimated by comparisons with