In Max Born's Nobel lecture, he alludes to Einstein's proposed interpretation of EM wave amplitude (squared) as being the probability of detecting a photon: "Again an idea of Einstein’s gave me the lead. He had tried to make the duality of particles - light quanta or photons - and waves comprehensible by interpreting the square of the optical wave amplitudes as probability density for the occurrence of photons."

In which of his papers did Einstein first propose that interpretation?

  • 5
    $\begingroup$ I'm voting to close this question as off-topic because it's primarily about history of physics, rather than physics itself. $\endgroup$ – Gert Sep 6 at 19:42
  • $\begingroup$ The question is not motivated by historical interest. Rather, the reason for the question is to read the original assertion in order to discern any nuance in meaning it might have conveyed. But if you think that perhaps "History of Science and Mathematics" is a more appropriate place to pose the question and get the desired answer, then certainly I'll post it there. Thanks for the guidance. $\endgroup$ – Dave Sep 6 at 20:24
  • 1
    $\begingroup$ This would be better for hsm.stackexchange. $\endgroup$ – Ben Crowell Sep 6 at 23:16
  • 2
    $\begingroup$ Seems perfect use of specific-reference to me $\endgroup$ – Kyle Kanos Sep 9 at 11:23
  • 1
    $\begingroup$ Answered here on hsm.stackexchange $\endgroup$ – Peter Shor Sep 10 at 17:56