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Showing 31 - 40 of 43
Showing 31 - 40 of 43
Sir Joseph John Thomson
Sir Joseph John Thomson (1856 - 1940) most important work was his original study of cathode rays culminating in the discovery of the electron.
Hits: 863
History of Physics Exhibits
Online exhibits including Marie Curie and the Discovery of Radioactivity, the History of the Transistor, Albert Einstein, the Discovery of the Electron; Heisenberg, and Sakharov.
Hits: 3255
Vacuum Tubes
The conduction of electricity in thin gases in vacuum tubes was the key to the discovery of the electron in 1897.Description of the discovery of Cathode rays.
Hits: 1474
Absorption and Emission
Taking the electron transitions associated with visible and ultraviolet interactions with matter as an example, absorption of a photon will occur only when the quantum energy of the photon precisely ...
Hits: 1508
Davisson-Germer Experiment
This experiment demonstrated the wave nature of the electron, confirming the earlier hypothesis of deBroglie. Putting wave-particle duality on a firm experimental footing, it represented a major step ...
Hits: 1126
Quantum Numbers
Each electron has a set of four numbers, called quantum numbers, that specify it completely; no two electrons in the same atom can have the same four.
Hits: 1123
Sir George Paget Thomson
Sir George Paget Thomson (1891 - 1975) received the Nobel Prize for Physics in 1937 along with Clinton Joseph Davisson for their discovery of the interference phenomena arising when crystals are ...
Hits: 955
Clinton Joseph Davisson
Clinton Joseph Davisson (1881 - 1958) received the Nobel Prize for Physics in 1937 along with George Paget Thomson for their discovery of the interference phenomena arising when crystals are exposed ...
Hits: 848
Stimulated Emission
If an electron is already in an excited state, then an incoming photon for which the quantum energy is equal to the energy difference between its present level and a lower level can "stimulate" a ...
Hits: 1063
Elementary Particles
Until 1931, the "elementary" particles were the electron, proton, and neutron. We now know of hundreds of other elementary particles. This site give a brief glimpse into all the various forms of ...
Hits: 1745
Showing 31 - 40 of 43