Rayleigh-Jeans law compared with electromag mass

I'll be getting back to walking with Planck, specifically on the subject mentioned above, the division of 2-dimensional phase space into cells of area h, which is thoroughly discussed in The Theory of Heat Radiation.  This was not something Planck did in his original papers of October and December 1900. As discussed at length in my previous post, he used Boltzmann's combinatorial formula for the sum of the number of complexions in the logarithm for the entropy of a resonator (electromagnetic oscillator), and from that found the average value of the resonator's energy, which is where he found that emission of discrete packets of e.m. energy fit the curves of the recently measured black-body radiation  spectrum. He only figured out the phase space thing later.

See my thesis for a discussion of electromagnetic mass, which is supposedly an entirely different type of infinite energy problem (evidently solved by renormalization techniques).

Hendrix College physics exam from 40 years ago

The day before Thanksgiving in 1978, which was the same calendar date as today, November 21, professor Richard Rolleigh gave his Mechanics I class the exam below. I was in the class, I took the exam, and I did pretty well.  But that was the last time that whole academic year that I did well on either homework or an exam, in Mechanics I and in Mechanics II. I'm still not sure why that was, maybe some sort of depression I was going through. I'm also not sure why the exam starts with 2.)  rather than 1.), but it could be that this is a repeat of a test Dr. Rolleigh gave to a previous Mechanics I class, and he left out problem 1.)  in giving my class the exam, and also added problem 7.), which was mimeographed not photocopied like the rest of the test.

Weinberg's notes on quantum mechanics history

Steven Weinberg's printed notes for the historical part of his intro to quantum mechanics class I took at UT-Austin in 1998.

my notes from Weinberg quantum class 8 Sept 1998

my notes from Weinberg quantum class 3 Sept 1998

my notes from Weinberg quantum class 1 Sept 1998

my notes from Weinberg quantum class 27 Aug 1998

I was a non-degree-seeking student at the University of Texas at Austin at the time.  I already has a master's degree in physics from Southwest Texas State University in San Marcos, but couldn't resist taking a low-level quantum theory class from Steven Weinberg.  He very seldom taught them.  The text was the sort-of standard at the time (and may still be), David J. Griffiths' Introduction to Quantum Mechanics.  But Weinberg gave us his own problem sets and handed out typed-up copies of his notes (and eventually published his own book on quantum mechanics). We had no exams, we only had to hand in the four or five problem sets he assigned us.  Probably no other professor could have gotten away with not giving a final exam.

Okay, so this last page isn't class notes, it's a note I made from Weinberg's advanced textbook, The Quantum Theory of Fields, Vol I, published in 1995.