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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. [1] [2] Franck and Hertz had designed a vacuum tube for studying energetic electrons that flew through a thin vapor of ...
His work included the Franck–Hertz experiment, an important confirmation of the Bohr model of the atom. He promoted the careers of women in physics, notably Lise Meitner, Hertha Sponer and Hilde Levi. After the Nazi Party came to power in Germany in 1933, Franck resigned his post in protest against the dismissal of fellow academics.
1914 - James Franck and Gustav Ludwig Hertz conduct the Franck–Hertz experiment demonstrating quantization of atomic ionization energy. 1919 – Arthur Eddington: Our sun as gravitational lens, a proof of the theory of relativity. 1920 – Otto Stern and Walter Gerlach conduct the Stern–Gerlach experiment, which demonstrates particle spin.
James Franck and Gustav Hertz's electron collision experiment shows that energy absorption by mercury atoms is quantized. (1914) Otto Stern and Walther Gerlach conduct the Stern–Gerlach experiment, which demonstrates the quantized nature of particle spin. (1920)
These anomalies are later explained by the discoveries of the neutrino and the neutron. Ștefan Procopiu performs experiments in which he determines the correct value of electron's magnetic dipole moment, μ B = 9.27 × 10 −21 erg·Oe −1 (in 1913 he is also able to calculate a theoretical value of the Bohr magneton based on Planck's quantum ...
A man accused of murdering a teenager has told a court he heard "screaming" but did not see the killing happen. Jamie Meah, 18, was stabbed to death and a 16-year-old boy was seriously injured ...
Wawa and a police carThis guy gave new meaning to the slogan “Gottahava Wawa.” Police in East Windsor, N.J., arrested a 24-year-old man on Dec. 23, and charged him with...
Overall, more than 30,000 employers across the US had at least one H-1B visa petition approved in 2024, and over half of those new petitions went to employers that filed 20 or fewer applications.