Wien's peak law, or Wien's displacement law is used to find the peak (or most probable) wavelength or frequency of the plank function for any given temperature.

## Wien's Peak Law for FrequencyEdit

$ \frac {h \nu _p}{kT} \approx 2.82 $

$ {h \nu _p} = 3kT $

This result is found by differentiating plank's law in frequency with respect to frequency and solving for the maximum. This results in a transcedental equation and solving that, will result in the equations above

## Wien's Peak Law for WavelengthEdit

$ \frac {hc}{\lambda _p kT} \approx 4.97 $

$ \frac {h \nu _p}{kT} \approx 4.97 $, using $ \nu _p \lambda _p = c $

$ h \nu _p = 5kT $