Albert Eintein in 1930, with Niels Bohr, at the Solvay convention, photo by Paul Ehrenfest

photo by Paul Ehrenfest – Albert Eintein in 1930, with Niels Bohr, at the Solvay convention

Albert Eintein in 1930, with Niels Bohr, at the Solvay convention, photo by Paul Ehrenfest

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