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  1. Jan 14, 2010 · These aspects are (1) Lenard's trigger hypothesis to explain the photoelectric effect, (2) Einstein's quantum hypothesis to explain the photoelectric effect, (3) lack of acceptance of Einstein's quantum hypothesis in the scientific community, (4) Millikan's experimental determination of the Einstein photoelectric equation and Planck's constant ...

  2. Walther Kossel. Philipp Eduard Anton von Lenard ( German pronunciation: [ˈfɪlɪp ˈleːnaʁt] ⓘ; Hungarian: Lénárd Fülöp Eduárd Antal; 7 June 1862 – 20 May 1947) was a Hungarian-born German physicist and the winner of the Nobel Prize for Physics in 1905 for his work on cathode rays and the discovery of many of their properties.

  3. The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation ( light ). Electrons emitted in this manner are called photoelectrons. The phenomenon is studied in condensed matter physics, solid state, and quantum chemistry to draw inferences about the properties of atoms, molecules and solids.

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  5. Mar 21, 2024 · cathode ray. photoelectric effect. Philipp Lenard (born June 7, 1862, Pressburg, Hung. [now Bratislava, Slovakia]—died May 20, 1947, Messelhausen, Ger.) was a German physicist and recipient of the 1905 Nobel Prize for Physics for his research on cathode rays and the discovery of many of their properties. His results had important implications ...

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  6. Apr 25, 2022 · Most significant of this period, however, were the studies undertaken by Philipp Lenard. Lenard extensively worked on researching the photoelectric effect and determined that the velocity at which electrons are emitted from a material is independent of the intensity of the light. This was one of the major discoveries that directly violated what ...

  7. explanation failed in 1911, there was no adequate theory of the. photoelectric effect. For another decade, the light quantum was con. sidered an unwarranted rejection of the thoroughly verified classical. wave theory of light. This paper describes the context, substance, and influence of. Lenard's investigation of the photoelectric effect.

  8. May 6, 2011 · One manual referred to Lenard’s contribution in the following terms: “In 1902, Philipp von Lenard made the observations of the photoelectric effect that challenged the conventional wisdom of the day, and prompted Einstein’s famous explanation of the effect” (Dalhousie University 2009, p. 1).

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