© Wikimedia Commons, GNU Free Documentation license, Version 1.2. Author: 4C, 04 August 2006.
In Unit 5, we learned that a blackbody at a particular temperature emits radiation according to the Planck distribution. As shown here, black bodies at higher temperatures produce more of this radiant energy, and the peak of the spectrum is shifted to energies that correspond to shorter wavelengths. An essential part of the derivation of these results, which are in excellent agreement with the experiment, was Planck's (implicit!) bosonic assumption that n quanta of light could occupy a mode at frequency,. (Unit: 6)