The Rayleigh-Jeans law reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Rayleigh-Jeans law

In physics, Rayleigh-Jeans Law, first proposed in the 19th century, expresses the energy density of blackbody radiation of wavelength λ as

where λ is in meters, T is the temperature in Kelvins, and k is Boltzmann's constant.

The law agrees with experimental measurements for long wavelengths but disagrees for short wavelengths, where it diverges and leads to the ultraviolet catastrophe.

Max Planck revised the law, which states:

where h is Planck's constant, c is the speed of light.

This is the "Rayleigh-Jeans law" reference article from the English Wikipedia. All text is available under the terms of the GNU Free Documentation License. See also our Disclaimer.