Caption: A graph of the Stefan-Boltzmann law radiant flux (AKA flux) F (black line called j in the figure) and the frequency-integrated Wien's approximation flux F (blue line). The vertical axis is in watts/meter**2.

The Stefan-Boltzmann law is

We can see that flux F increasing as the 4th power of temperature---a very strong increase with temperature.

The frequency-integrated Wien's approximation is:

where ζ(s) is the Rieman zeta function and

This is **NOT**
log-log plot, but it should be
in order to show the behavior over the whole temperature
range from 0 to 10**4 K.

Credit/Permission: ©
User:Netheril96,
2011 /
Creative Commons
CC BY-SA 3.0.

Image linked to Wikipedia.

Local file: local link: stefan_boltzmann_law.html.

File: Blackbody file:
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