I have read the derivation of the Rayleigh-Jeans law from:(adsbygoogle = window.adsbygoogle || []).push({});

http://www.cv.nrao.edu/course/astr534/BlackBodyRad.html

This derivation is quite similar to the derivation in my textbook.

My question is why the frequency/wavelength is quantized, but there still a d[itex]\nu[/itex] or d[itex]\lambda[/itex]. Not this "d" only apply to continuous variables?

And since the frequency is quantized, that means the emission spectrum is not continuous? But my textbook said "condensed state emits a continuous spectrum of radiation."

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# Derivation of Rayleigh–Jeans law

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