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Simple demonstration of the photoelectric effect using different coloured filters to alter the frequency of light reaching a metal plate, and the current changes accordingly.
An explanation of the photoelectric effect and its implications for quantum physics.
An account of Einstein's discovery of the photoelectric effect and its implications.
Java Applet simulating a photoelectric effect experiment, measuring current and stopping potential for a variety of metals and monochromatic wavelengths. A sophisticated simulated experiment.
The site is an interactive page to study the photoelectric effect on different materials (sodium, cesium and silver) by changing the wavelength and the intensity of the light.
The details of this phenomenon were in direct contradiction to the expectations of very well developed classical physics. The explanation marked one of the major steps toward quantum theory.
The page gives us a wide range of links on many important topics in current Physics (accelerator, atoms, Fission, Fusion, Photoelectric Effect, Photons etc)
Worked example to find out whether light will cause electrons to be emitted from a metal.
Sir Owen Richardson (1879 - 1959) worked on thermionics, photoelectric effects, magnetism, the emission of electrons by chemical action, the theory of electrons, the quantum theory, the spectrum of ...
Robert Millikan (1868 - 1953) received the Nobel Prize for Physics in 1913 for his work on the elementary charge of electricity and on the photoelectric effect.
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