File:Niels Bohr Albert Einstein4 by Ehrenfest.jpg

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en:Niels Bohr and en:Albert Einstein. Foto by Paul Ehrenfest (1880-1933).

The picture was taken at Ehrenfest's home in Leiden, the occasion was most likely the 50th anniversary of Hendrik Lorentz' doctorate (December 11, 1925)
Source https://www.nature.com/articles/456706a (and other sites as well)
Author en:Paul Ehrenfest

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The author died in 1933, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 80 years or fewer.

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current03:14, 28 November 2023Thumbnail for version as of 03:14, 28 November 20231,979 × 2,981 (3.65 MB)Materialscientist (talk | contribs)=={{int:filedesc}}== {{information |description=en:Niels Bohr and en:Albert Einstein. Foto by Paul Ehrenfest (1880-1933).<br> The picture was taken at Ehrenfest's home in Leiden, the occasion was most likely the 50th anniversary of Hendrik Lorentz' doctorate (December 11, 1925) |author=en:Paul Ehrenfest |source=https://www.nature.com/articles/456706a (and other sites as well) }} =={{int:license-header}}== {{PD-old-auto|deathyear=1933}} [[Category:Niels Bohr and Albert Einstei...

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