Uploads from Dr. Jorge S. Diaz

Currently Playing: Unveiling the electron with oil drops

Support the channel: https://ko-fi.com/jkzero Detailed presentation of the historic oil-drop experiment conducted by Robert Millikan and Harvey Fletcher, which determined the electric charge of the electron and established the electron as the first subatomic particle. Videos: The Birth of Quantum Mechanics https://www.youtube.com/watch?v=WNHn6GoMaac Millikan tests Einstein's Light Theory https://www.youtube.com/watch?v=fQzirkrXOxk Playlist: Quantum Mechanics https://www.youtube.com/playlist?list=PL_UV-wQj1lvVxch-RPQIUOHX88eeNGzVH References: ∘ J.J. Thomson, Cathode Rays, Phil. Mag. 44, 293 (1897) https://books.google.de/books?id=orp_EP-lkzoC&pg=PA293 ∘ R.A. Millikan, The Isolation of an Ion, a Measurement of Its Charge, and the Correction of Stokes's Law, Phys. Rev. 32, 349 (1911) https://journals.aps.org/pri/abstract/10.1103/PhysRevSeriesI.32.349 ∘ R.A. Millikan, On the Elementary Electrical Charge and the Avogadro Constant, Phys. Rev. 2, 109 (1913) https://journals.aps.org/pr/abstract/10.1103/PhysRev.2.109 ∘ H. Fletcher, My work with Millikan on the oil‐drop experiment, Physics Today 35 (6), 43 (1982) https://doi.org/10.1063/1.2915126 Credits: J. J. Thomson with his cathode-ray tube by pixel17.com under CC BY-SA 2.0 Deed https://creativecommons.org/licenses/by-sa/2.0/deed.en Crookes tube by D-Kuru under CC BY-SA 3.0 AT Deed https://creativecommons.org/licenses/by-sa/3.0/at/deed.en Cathode rays deflected in a magnetic field by M. Białek under CC BY-SA 4.0 Deed https://creativecommons.org/licenses/by-sa/4.0/ Robert Millikan, public domain Albert Michelson, public domain Michelson interferometer, public domain Ryerson Physical Lab at UChicago, public domain Erich Regener by Regener family under CC BY 3.0 Deed https://creativecommons.org/licenses/by/3.0/deed.en Wilson cloud chamber by Caltech, The Mechanical Universe youtu.be/sUc13Q8CF3s Harvey Fletcher, public domain Magic Lantern by A. Niemimäki under CC BY-SA 2.0 Deed https://creativecommons.org/licenses/by-sa/2.0/deed.en Pocket watch by F. van Duns under CC BY-SA 4.0 Deed https://creativecommons.org/licenses/by-sa/4.0/deed.en Vintage atomizer perfume by A. Andriot & Vetiver Aromatics (https://vetiveraromatics.com) under CC BY-SA 3.0 Deed https://creativecommons.org/licenses/by-sa/3.0/deed.en Mist spray by K. Grabowska in Pexels https://www.pexels.com/video/a-person-spraying-a-room-mist-6639617/ Harvey Fletcher, public domain Oil-drop apparatus, public domain Fletcher-Millikan's setup for the oil drop experiment, public domain Bell Telephone Laboratories, Murray Hill NJ, public domain Harvey Fletcher by Karden-Kazanjian, Bell Telephone Laboratories Publication Department, courtesy AIP Emilio Segrè Visual Archives Fletcher conducts a hearing test on school children (1928), Bell Laboratories / Alcatel-Lucent USA Inc., courtesy AIP Emilio Segrè Visual Archives, Lillian Hoddeson Collection Technical Grammy adapted from A. Blumlein under CC BY-SA 4.0 Deed