Il Nuovo Cimento B (1971-1996)

, Volume 64, Issue 2, pp 347–357 | Cite as

Internal and external temperatures

  • P. F. González-Díaz


In this paper we distinguish between the relativistic concepts of internal (inside a particle) and external (outside a particle) temperatures. Whereas the former is inversely related to the frequency associated with the particle and transforms as predicted by the Planck law, the latter is proportional to that frequency and transforms according to the Ott law. In the Newtonian limit (v/c→0) these two concepts become the same and are both discussed in the framework of a canonical scheme of thermodynamics.

Внутренняя и внешняя температуры


В этой статье мы проводим различие между релятивистскими концепциями внутренней (внутри частицы) и внешней (вне частицы) температуры. В то время как первая температура обратно пропорциональна частоте, связанной с частицей, и преобразуется согласно закону Планка, то вторая температура пропорциональна этой частоте и преобразуется согласно закону Отта. В ньютоновском пределе (v/c→0) эти две концепции являются одинаковьми. Обе концепции обсуждаются в рамках канонической схемы термодинамики.


In questo lavoro si opera una distinzione tra concetti relativistici di temperatura interna (dentro la particella) ed esterna (fuori dalla particella). Mentre la prima è inversamente correlata con la frequenza associata con la particella e si trasforma come previsto dalla legge di Planck, la seconda è proporzionale a quella frequenza e si trasforma secondo la legge di Ott. Nel limite newtoniano (v/c→0) questi due concetti diventano un solo concetto e sono entrambi discussi nel contesto di uno schema canonico della termodinamica.


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Copyright information

© Società Italiana di Fisica 1981

Authors and Affiliations

  • P. F. González-Díaz
    • 1
  1. 1.Instituto de Optica «Daza de Valdés»C.S.I.C.Madrid-6Spain

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