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The Franck–Hertz experiment, the first electrical measurement to clearly demonstrate quantum mechanics, was presented to the German Physical Society.
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Franck–Hertz experiment
1914 confirmation of the atom's quantum nature
The Franck–Hertz experiment was the first electrical measurement to clearly show the quantum nature of atoms. It was presented on April 24, 1914, to the German Physical Society in a paper by James Franck and Gustav Hertz. Franck and Hertz had designed a vacuum tube for studying…Source: Wikipedia (CC BY-SA)
Quantum mechanics
Description of physical properties at the atomic and subatomic scale
Quantum mechanics is the fundamental physical theory that describes the behavior of matter and of light; its unusual characteristics typically occur at and below the scale of atoms. It is the foundation of all quantum physics, which includes quantum chemistry, quantum field…Source: Wikipedia (CC BY-SA)
German Physical Society
Physics organisation in Germany
The German Physical Society is the oldest organisation of physicists. DPG's 2025 worldwide membership is cited as 50,668, with a peak of 63,012 in 2014. It holds an annual conference and multiple spring conferences, which are held at various locations and along topical subjects…Source: Wikipedia (CC BY-SA)