Niels Bohr Albert Einstein by Ehrenfest

Autor:

Paul Ehrenfest

Original uploader was Graf at de.wikipedia

Credit:

http://www.dfi.dk/dfi/pressroom/kbhfortolkningen/

Krótki link:

https://plwiki.pl/b/17

źródło:

Wikimedia Commons

Wymiary:

1467 x 2123 Pixel (1722663 Bytes)

Opis:

Niels Bohr and Albert Einstein. 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).

Licencja:

Public domain

Komentarz do licencji:

This photo is PD in the Netherlands, its country of origin. Publication information is needed to determine if it is also PD in the U.S. If this photo was unpublished (or not published until 2003 or later), then it is considered PD in the U.S.