On Friday, May 29, 2020 at 8:39:43 AM UTC-6, Alan Grayson wrote: > > > > On Friday, May 29, 2020 at 8:11:12 AM UTC-6, Alan Grayson wrote: >> >> >> >> On Friday, May 29, 2020 at 6:26:20 AM UTC-6, John Clark wrote: >>> >>> On Thu, May 28, 2020 at 6:28 PM Alan Grayson <[email protected]> >>> wrote: >>> >>> *> Wiki has a good article on this. Oddly, when I took E&M courses, >>>> undergraduate and graduate, I don't recall this issue ever being >>>> discussed, >>>> at least not in detail. I don't recall any detailed discussion of Planck's >>>> radiation law; that is, how it's derived. AG * >>>> >>> >>> Wow, you must have had some pretty crappy physics courses! >>> >>> John K Clark >>> >> >> In E&M, Yes, but surely not in QM. When we got to Maxwell's displacement >> current, the professor did some hand-waving related to delta functions, >> which was very unsatisfying. A good course in E&M would, IMO, include a >> rigorous discussion of Planck's BB formula, since it is where quantum >> physics begins, and including a rigorous treatment Maxwell's displacement >> current and wave solutions of the Maxwell's equation. I doubt you have had >> a good course in QM, and in physics in general, since you deny that >> theories of physics start with postulates, when they obviously do. AG >> > > If you doubt my position on postulates when it comes to physical theories, > let me give you a simple example, namely the invariance of the measured SoL > (independent of motion of source and recipient). This *postulate* is > highly un-intuitive, but it was used by Einstein in his 1905 paper on SR to > derive the Lorentz transformation. In QM, Schroedinger's equation is one of > the postulates, as well as Born's Rule, and so forth. AG >
Clark, since you claim implicitly to having a serious understanding of E&M, can you give a proof of Planck's BB radiation law? AG -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/7f273583-f50c-4db3-ae0e-98b8219cc4eb%40googlegroups.com.
