Blackbody Radiation: Frequency and Wavelength

Blackbody Radiation: Frequency and Wavelength is a handy, easy to use, Java based  tool specially designed to help you analyze the blackbody radiation curves of Planck both as a function of frequency and as a function of wavelength to allow for comparison of the two functions.

The Planck radiation law can be derived both as a function of frequency and as a function of wavelength. In doing so, one gets two slightly different expressions for the energy density per frequency (wavelength) as a function of frequency (wavelength. Shown in the main window is a schematic of a blackbody cavity showing (on the right) the color of the radiation emitted.

The graph plots the energy density per frequency (wavelength) as a function of frequency (wavelength and shows the visible spectrum. One can switch between the two functions by using the radio buttons provided. A slider alows the twmperature to be set or changed.