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How did Lenard explain the photoelectric effect?
How did Lenard explain the photoeffect?
What did Philipp Lenard study?
How did Lenard equate photocurrent 'particles' with cathode rays?
Jan 14, 2010 · Lenard's trigger hypothesis to explain the photoelectric effect (C1). Lenard made the important experimental determination that in photoelectric phenomena the velocity of the ejected electrons is independent of the intensity of light.
One of his most important contributions was the experimental realization of the photoelectric effect. He discovered that the energy (speed) of the electrons ejected from a cathode depends only on the frequency, and not the intensity, of the incident light.
During the years 1886–1902, Wilhelm Hallwachs and Philipp Lenard investigated the phenomenon of photoelectric emission in detail. Lenard observed that a current flows through an evacuated glass tube enclosing two electrodes when ultraviolet radiation falls on one of them.
Mar 21, 2024 · In similar experiments in 1899 he proved that cathode rays are created when light strikes metal surfaces; this phenomenon later became known as the photoelectric effect. Lenard’s extensive research also included studies of ultraviolet light, the electrical conductivity of flames, and phosphorescence.
- The Editors of Encyclopaedia Britannica
PHILIPP LENARD AND THE PHOTOELECTRIC EFFECT 301 mechanism for the absorption of classical electromagnetic waves. The light quantum proposed by Einstein to answer more general issues incidentally offered another explanation of the photoeffect. But other physicists preferred the triggering hypothesis. After the triggering
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 [2].
Philipp Lenard and the Photoelectric Effect, 1889-1911. B. Wheaton. Published 1978. Physics. Hist Stud Phys Sci. Philipp Lenard discovered in 1902 that the maximum velocity with which electrons leave a metal plate after it is illuminated with ultra violet light is independent of the intensity of the light. He concluded that "in the process of ...
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