Explain the demonstration of Kirchhoff's law on blackbody

[kevinaltieri]

The Kirchhoff law of dependence of energy emitted from a blackbody only on wave length and temperature was demonstrated by Kirchhoff in a paper in the year 1859. The paper is in german naturally but I found it translated in english in a book of prof. Brace in 1901. A lot of time ago. But my question is, does somebody know this demonstration that to me seem really difficult to undestand? And could he explain in a different way this demonstration?

 

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The Kirchhoff law of dependence of energy emitted from a blackbody only on wave length and temperature was demonstrated by Kirchhoff in a paper in the year 1859. The paper is in german naturally but I found it translated in english in a book of prof. Brace in 1901. A lot of time ago. But my question is, does somebody know this demonstration that to me seem really difficult to undestand? And could he explain in a different way this demonstration?

1. Post or give a link to the exact text you are referring to.
2. Explain in detail which parts you don't understand and why.

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