An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Rayleigh-Jeans law
  قانون ِ ریلی-جینز  
qânun-e Rayleigh-Jeans(#)
Fr.: loi de Rayleigh-Jeans  

A classical law approximately describing the intensity of radiation emitted by a → blackbody. It states that this intensity is proportional to the temperature divided by the fourth power of the wavelength (8πkT/λ4). The Rayleigh-Jeans law is a good approximation to the experimentally verified Planck radiation formula only at long wavelengths. At short wavelengths it runs into a paradox named the → ultraviolet catastrophe.

See also: → Rayleigh; → Jeans;
→ law.