Portrait of the German theoretical physicist Max Planck (1858-1947), and his first wife Marie (nee Merck, 1861-1909). Planck pioneered quantum mechani

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Portrait of the German theoretical physicist Max Planck (1858-1947), and his first wife Marie (nee Merck, 1861-1909). Planck pioneered quantum mechanics, revolutionizing classical physics. His 1900 paper describing black body radiation proposed that radiation must be emitted or received in energy packets (quanta), rather than continuously. Quantum theory was fully accepted after its successful prediction of the photoelectric effect (Einstein, 1905) and of the electronic structure of atoms (Bohr, 1913). Planck received the 1918 Nobel Prize in Physics for his work.

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Size: 2308px × 3805px
Photo credit: © AMERICAN PHILOSOPHICAL SOCIETY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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