03. Blackbody radiation, thermodynamics of a photon gas, Wien's law, Planck's radiation law

Slides and transcripts: drive.google.com/drive/folder...
0:00 Recap of previous videos
6:10 Radiation pressure recap
7:11 Temperature of radiation
9:38 'Photon gas law'
11:34 Radiation pressure of diffuse light
15:51 Stefan-Boltzmann law derivation
19:30 Thermodynamic quantities for a photon gas
20:40 Wien's displacement law
34:05 Wien's radiation law
36:16 Objections to Boltzmann's statistical mechanics
39:04 Planck's re-derivation of Wien's law
43:04 Planck's improvement of Wien's law
49:06 Modern derivation of Planck's law
50:56 Rayleigh-Jeans and the ultraviolet catastrophe
53:30 History and quasi-history
57:03 Summary

[@eamonnsiocain6454]

Well written and produced

[@mre_physvids]

This is outstanding. I have Stat Mech in the fall and when we get to black body radiation, I may take a day off and just run this video.

[@joranlefleur7942]

I really like how well your videos are structured and clearly articulated, fantastisch! Keep up the great work Sander.

[@JohnSmall314]

Absolutely superb

[@jacobvandijk6525]

@ 55:25 Planck didn't have a physical interpretation for his law. And therefore, he didn't like it that much (hello, string theorists, you can learn from this man), even after Einstein used the quantum to explain the photoelectric effect. In general, physicists didn't like the quantum at all. So it was more than logical that around 1905 Rayleigh and Jeans came up with their own version.