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  1. Vor 2 Tagen · Thomson's problem is related to the 7th of the eighteen unsolved mathematics problems proposed by the mathematician Steve Smale — "Distribution of points on the 2-sphere". The main difference is that in Smale's problem the function to minimise is not the electrostatic potential 1 r i j {\displaystyle 1 \over r_{ij}} but a logarithmic potential given by − log ⁡ r i j . {\displaystyle ...

  2. Vor 3 Tagen · Joseph John Thomson stellte 1897 fest, dass die in Gasentladungsröhren beobachteten Kathodenstrahlen leichte materielle Teilchen und keine Ätherwellen waren.

  3. en.wikipedia.org › wiki › Niels_BohrNiels Bohr - Wikipedia

    Vor 3 Tagen · The evolution of atomic models in the 20th century: Thomson, Rutherford, Bohr, Heisenberg/Schrödinger. In 1885, Johann Balmer had come up with his Balmer series to describe the visible spectral lines of a hydrogen atom:

  4. www.cosmos-indirekt.de › Physik-Schule › Enrico_FermiEnrico Fermi – Physik-Schule

    Vor 5 Tagen · das Thomas-Fermi-Modell, Atommodell, in dem die Elektronenhülle wie ein Gas von Elektronen behandelt wird; Fermis Goldene Regel; Fermi-Pasta-Ulam-Experiment; Fermi-Wechselwirkung (Fermikonstante) Philosophische und methodische Konzepte: das Fermi-Paradoxon zur Frage, ob wir die einzigen intelligenten Wesen im Universum sind

  5. Vor 5 Tagen · Thomson’s Atomic Model. Sir Joseph John Thomson was also an English chemist famous for his discovery of electrons known as Thomson’s Atomic Model, for which he also got the Nobel Prize. He conducted a cathode ray experiment to invent electrons. He proposed that atoms are like a sphere of positive charge with negative charge ...

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  6. en.wikipedia.org › wiki › ElectronElectron - Wikipedia

    Vor einem Tag · In 1897, the British physicist J. J. Thomson, with his colleagues John S. Townsend and H. A. Wilson, performed experiments indicating that cathode rays really were unique particles, rather than waves, atoms or molecules as was believed earlier.

  7. Vor 5 Tagen · Joule-Thomson effect, the change in temperature that accompanies expansion of a gas without production of work or transfer of heat. At ordinary temperatures and pressures, all real gases except hydrogen and helium cool upon such expansion; this phenomenon often is used in liquefying gases.