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Home > Rayleigh-Jeans law


 

In physics, the 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.

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Physics

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