Planck’s radiation law, the light quantum, and the prehistory of indistinguishability in the teaching of quantum mechanics

  title={Planck’s radiation law, the light quantum, and the prehistory of indistinguishability in the teaching of quantum mechanics},
  author={Oliver Passon and Johannes Grebe-Ellis},
  journal={European Journal of Physics},
Planck’s law for black-body radiation marks the origin of quantum theory and is discussed in all introductory (or advanced) courses on this subject. However, the question whether Planck really implied quantisation is debated among historians of physics. We present a simplified account of this debate which also sheds light on the issue of indistinguishability and Einstein’s light quantum hypothesis. We suggest that the teaching of quantum mechanics could benefit from including this material… 
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