# How do you derive Planck's constant?

##### 1 Answer

Mar 16, 2014

Planck's constant is a measured quantity that relates the frequency of any quantum mechanical oscillator (e.g., a photon) to its energy.

The original determination of Planck's constant was made by fitting the spectrum of a blackbody radiator, but several other more accurate methods are used today. A summary of methods can be found at http://en.wikipedia.org/wiki/Planck_constant.