Abstract
Blackbody radiation inside a closed cavity is nothing other than the electromagnetic fields emitted from those atoms forming the cavity. In this work, these fields are calculated in the non-relativistic classical domain for the purpose of analyzing the distribution of the radiation inside the cavity in the low-frequency limit. Under the assumption that the cavity is a spherical one, the intensity of the blackbody radiation at some frequency is obtained and found to be uniform only in a small region around the center of the cavity. With the help of the theorem of equipartition, the intensity, or the spectrum of the blackbody radiation, is then expressed as a function of the temperature of the cavity and shown to satisfy the familiar Rayleigh–Jeans’ law. Some other properties of the blackbody radiation are also discussed.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
D. C. Bertilone
J. Opt. Soc. Am. A 14(3) 693-702 (1997)
Mohammad Al Lakki, Tero Setälä, and Ari T. Friberg
J. Opt. Soc. Am. A 37(9) 1442-1447 (2020)
Chinmay Khandekar, Liping Yang, Alejandro W. Rodriguez, and Zubin Jacob
Opt. Express 28(2) 2045-2059 (2020)