Condensed Matter

1403 Submissions

[2] viXra:1403.0936 [pdf] submitted on 2014-03-25 21:57:34

Further Insight Relative to Cavity Radiation II: Gedanken Experiments and Kirchhoff’s Law

Authors: Pierre-Marie Robitaille
Comments: 5 Pages. First published in: Progress in Physics, 2014, v. 10(1), 116-120.

Kirchhoff’s law of thermal emission states that cavity radiation must always be black, or normal, irrespective of the nature of the walls. Arbitrary cavity radiation must be solely dependent upon the equilibrium temperature and the frequency of observation. Despite such theoretical claims, it is well established that laboratory blackbodies are not constructed from arbitrary materials, but rather from nearly perfect absorbers of radiation over the frequency of interest. In the laboratory, arbitrary cavities do not contain black radiation. This experimental fact stands in direct conflict with Kirchhoff’s formulation. Nonetheless, Kirchhoff’s law of thermal emission endures, in part, due to Gedanken experiments whose errors in logic are difficult to ascertain. In this work, thought experiments are discussed in order to expose some logical shortcomings. It will be demonstrated that Kirchhoff’s law cannot be supported in this context.
Category: Condensed Matter

[1] viXra:1403.0935 [pdf] replaced on 2014-12-26 16:34:37

On the Equation which Governs Cavity Radiation

Authors: Pierre-Marie Robitaille
Comments: 2 Pages. First published in: Progress in Physics, 2014, v.2(10), 126-127 (revised December 26, 2014).

In this work, the equation which properly governs cavity radiation is presented. Given thermal equilibrium, the radiation contained within an arbitrary cavity depends upon the nature of its walls, in addition to its temperature and its frequency of observation. With this realization, the universality of cavity radiation collapses. The constants of Planck and Boltzmann can no longer be viewed as universal.
Category: Condensed Matter