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Releya-Dzhinsa zakon izlucheniya

- priblizhennyi zakon raspredeleniya energii v spektre el.-magn. izlucheniya absolyutno chernogo tela v zavisimosti ot chastoty $\nu$ (pri dannoi temp-re T tela). Vyveden angl. fizikami Dzh. Releem (1900 g.) i nezavisimo (1905 g.) Dzh. Dzhinsom. Energiya, izluchaemaya ed. poverhnosti absolyutno chernogo tela v ed. vremeni v edinichnom intervale chastot,
$E(\nu,T)={2\pi kT\over {c^2}}\cdot \nu^2 \quad \left( {\mbox{erg} \over {\mbox{s} \cdot \mbox{sm}^2 \cdot \mbox{Gc}}}\right)$ ,
dlya edinichnogo intervala dlin voln
$E(\nu,T)={2\pi ckT\over {\lambda^4}} {\mbox{erg} \over {\mbox{s} \cdot \mbox{sm}^3}}$ .
R.-D.z.i. spravedliv lish' dlya dostatochno malyh chastot ili, chto to zhe samoe, dlya dlinnyh dlin voln. Ego mozhno poluchit' iz Planka zakona izlucheniya dlya sluchaya, kogda energiya $h\nu$ fotona mala ( $h\nu\ll kT$ ). R.D.z.i. imeet bol'shoe praktich. znachenie, t.k. on primenim k teplovomu kosmich. radioizlucheniyu, a takzhe k dlinnovolnovoi chasti optich. izlucheniya mnogih zvezd.

"Fizika Kosmosa", 1986
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