Oral History Transcript — Dr. Ludwig Edelstein
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Ludwig Edelstein; May 7, 1962
ABSTRACT: Part of the Archives for the History of Quantum Physics oral history collection, which includes tapes and transcripts of oral history interviews conducted with ca. 100 atomic and quantum physicists. Subjects discuss their family backgrounds, how they became interested in physics, their educations, people who influenced them, their careers including social influences on the conditions of research, and the state of atomic, nuclear, and quantum physics during the period in which they worked. Discussions of scientific matters relate to work that was done between approximately 1900 and 1930, with an emphasis on the discovery and interpretations of quantum mechanics in the 1920s. Also prominently mentioned are: Albert Einstein, Philipp Lenard; Deutsche Naturforscher-Gesellschaft meeting (Bad Nauheim, 1920), and Universitat Heidelberg.
It probably was in 1920. As I told you I had started school, but I happened to be in Bad (Nauheim) then. The meeting of the Deutsche Naturforscher-Gesellschaft was taking place. Einstein’s theory of relativity was discussed -- it seems to me for the first time at a public meeting. I am really not sure. By some device I was able to get into the morning session. It started rather early in the morning. Practically everybody I had ever heard of in physics was there; Planck, Debye, Nernst, a number of other people. The discussion went on and on, and I did not understand anything at all, naturally. But I remember very much that after two hours or so Mr. Lenard got up and attacked Einstein quite violently.
One felt that there was great tension and great emotion on both sides…You had the feeling that people somehow feared Lenard might say things which it would not be agreeable to hear. I do not remember anything except the remark he finally made. He turned to Einstein and said, “Well surely if I tell the guard of the railroad company, who is watching the train, that he is moving and the train is standing, this is against common sense.” And there was silence for a moment, and finally Einstein said in a very low voice, “May I point out to my colleague Lenard that common sense is something very relative.” As far as I can recall the words, he said in German “Darf ich dem Herrn Kollegen Lenard sagen, dass der gesunde Menschenverstand etwas sehr relativitischist.” Laughter is not the adequate word to describe the reaction. Nobody could say anything, and people went home. It was also near lunchtime, I think. But it was more, I feel, that was said at the argument between Lenard and Einstein. You see I at that time didn’t know anything about the debate that had gone on behind the scenes, so my impression as I have remembered it through all these years was really, I think, the impression I had at that moment. I did not even know about the controversy, and the tension between Jewish physics and German physics…Later on it was quite clear, you see. I came as a student to Heidelberg in 1925, and by that time I knew. As a matter of fact I went to one of the lectures of Lenard, a general lecture in physics. But you see, I did (???)