Encyclopedia > Rayleigh-Jeans law

  Article Content

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

<math> f(\lambda) = 8\pi k\frac{T}{\lambda^4}</math>

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.

Max Planck revised the law, which states:

<math>f(\lambda) = 8\pi hc \frac{\lambda^{-5}}{e^\frac{hc}{\lambda kT}-1}</math>

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



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Autocracy

... - Wikipedia <<Up     Contents Autocracy Autocracy is a form of government which resides in the absolute power of a single individual. The term ...

 
 
 
This page was created in 27.1 ms