
“Everybody wondered (and still wonders) why the Stockholm committee systematically ignored Sommerfeld’s pioneer work in modern physics. Such an omission is actually impossible to understand.”
Leon Brillouin, in the foreword of his book WAVE PROPAGATION AND GROUP VELOCITY (1959)
Brillouin further mentions the teachers who taught him, and rates Sommerfeld among the best:
“I had the great privilege of attending, as a student, lectures given by some prominent physicists, such as H. A. Lorentz, H. Poincaré, and P. Langevin. But I was especially impressed by Sommerfeld’s mastery as a teacher.“