Rayleigh–Jeansn.

Brit.

/ˌreɪlɪˈdʒiːns/, U.S.

/ˌreɪliˈdʒins/

Origin: From proper names. Etymons: proper names Rayleigh, Jeans.

Etymology: < the title of J. W. Strutt, 3rd Baron Rayleigh (see Rayleigh n.¹) + the name of Sir James Hopwood Jeans (1877–1946), English physicist and astronomer. Compare German Rayleigh-Jeans-Katastrophe (1911).Rayleigh first published his equation in Philos. Mag. (1900) 49 539; Jeans published a correction in Philos. Mag. (1905) 10 91, which was acknowledged by Rayleigh in Nature (1905) 13 July 243.

Physics.

Used attributively with reference to an approximation to Planck's radiation law that is valid only at long wavelengths and states that the flux of radiation from a black body at any particular wavelength is proportional to its temperature divided by the fourth power of the wavelength.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > heat > [noun] > science or study of > law of

Dulong and Petit's law1863

Rayleigh–Jeans1918

1918 Proc. Royal Soc. 94 281 If the Rayleigh-Jeans laws of radiation be assumed to hold, the ultimate energy due to radiation alone is two-thirds of that derived from the kinetic theory of gases.

1930 A. E. Ruark & H. C. Urey Atoms, Molecules & Quanta iii. 59 Planck's law approaches the Rayleigh–Jeans law if h approaches zero.

1970 G. K. Woodgate Elem. Atomic Struct. iii. 36 The approximation corresponds, for thermal radiation, to..n̄ ≈ kT / hν ≫ 1, which..leads at once to the Rayleigh–Jeans approximation for the energy density per unit frequency range.

2003 J. Losee Theories Sci. Progress vi. 54 Planck's equation is in asymptotic agreement with the Wien equation at short wavelengths and the Rayleigh–Jeans equation at long wavelengths.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).

单词	rayleigh–jeans
释义	Rayleigh–Jeansn. Brit. /ˌreɪlɪˈdʒiːns/, U.S. /ˌreɪliˈdʒins/ Origin: From proper names. Etymons: proper names Rayleigh, Jeans. Etymology: < the title of J. W. Strutt, 3rd Baron Rayleigh (see Rayleigh n.¹) + the name of Sir James Hopwood Jeans (1877–1946), English physicist and astronomer. Compare German Rayleigh-Jeans-Katastrophe (1911).Rayleigh first published his equation in Philos. Mag. (1900) 49 539; Jeans published a correction in Philos. Mag. (1905) 10 91, which was acknowledged by Rayleigh in Nature (1905) 13 July 243. Physics. Used attributively with reference to an approximation to Planck's radiation law that is valid only at long wavelengths and states that the flux of radiation from a black body at any particular wavelength is proportional to its temperature divided by the fourth power of the wavelength. ΘΚΠ the world > matter > physics > electromagnetic radiation > heat > [noun] > science or study of > law of Dulong and Petit's law1863 Rayleigh–Jeans1918 1918 Proc. Royal Soc. 94 281 If the Rayleigh-Jeans laws of radiation be assumed to hold, the ultimate energy due to radiation alone is two-thirds of that derived from the kinetic theory of gases. 1930 A. E. Ruark & H. C. Urey Atoms, Molecules & Quanta iii. 59 Planck's law approaches the Rayleigh–Jeans law if h approaches zero. 1970 G. K. Woodgate Elem. Atomic Struct. iii. 36 The approximation corresponds, for thermal radiation, to..n̄ ≈ kT / hν ≫ 1, which..leads at once to the Rayleigh–Jeans approximation for the energy density per unit frequency range. 2003 J. Losee Theories Sci. Progress vi. 54 Planck's equation is in asymptotic agreement with the Wien equation at short wavelengths and the Rayleigh–Jeans equation at long wavelengths. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < n.1918
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