Volume 88, Number 2, October 2009
Article Number 20004
Number of page(s) 4
Section General
Published online 02 November 2009
EPL, 88 (2009) 20004
DOI: 10.1209/0295-5075/88/20004

Lorentz transform of black-body radiation temperature

T. K. Nakamura

Fukui Prefectural University - 910-1195 Fukui, Japan

received on 15 September 2009; accepted in final form by R. A. Treumann on 28 September 2009; published October 2009
published online 2 November 2009

The Lorentz transform of black-body radiation has been investigated from the viewpoint of relativistic statistical mechanics. The result shows that the well-known expression with the directional temperature can be derived based on the inverse-temperature four-vector. The directional temperature in the past literature was the result of mathematical manipulation and its physical meaning is not clear. The inverse-temperature four-vector has, in contrast, clear meaning to understand relativistic thermodynamical processes.

05.30.-d - Quantum statistical mechanics.
98.70.Vc - Background radiations.

© EPLA 2009