Details
The law may be written as
where
-
- is the amount of energy per unit surface area per unit time per unit solid angle per unit frequency emitted at a frequency ν.
- is the temperature of the black body.
- is Planck's constant.
- is the speed of light.
- is Boltzmann's constant.
This equation may also be written as
where is the amount of energy per unit surface area per unit time per unit solid angle per unit wavelength emitted at a wavelength λ.
The peak value of this curve, as determined by taking the derivative and solving for zero, occurs at a wavelength λmax and frequency νmax of:
in cgs units.
Read more about this topic: Wien Approximation
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