Search results
Results From The WOW.Com Content Network
1897 J. J. Thomson discovered the electron; 1897 Emil Wiechert, Walter Kaufmann and J.J. Thomson discover the electron; 1898 Marie and Pierre Curie discovered the existence of the radioactive elements radium and polonium in their research of pitchblende; 1898 William Ramsay and Morris Travers discover neon, and negatively charged beta particles
Since an electron behaves as a wave, at a given velocity it has a characteristic de Broglie wavelength. This is given by λ e = h/p where h is the Planck constant and p is the momentum. [60] For the 51 GeV electron above, the wavelength is about 2.4 × 10 −17 m, small enough to explore structures well below the size of an atomic nucleus. [147]
1932 Antielectron (or positron), the first antiparticle, discovered by Carl D. Anderson [13] (proposed by Paul Dirac in 1927 and by Ettore Majorana in 1928) : 1937 Muon (or mu lepton) discovered by Seth Neddermeyer, Carl D. Anderson, J.C. Street, and E.C. Stevenson, using cloud chamber measurements of cosmic rays [14] (it was mistaken for the pion until 1947 [15])
The electron was discovered between 1879 and 1897 in works of William Crookes, ... electromagnetic waves were reformulated in terms of particles called photons.
This discovery of the wave–particle duality of matter and energy is fundamental to the later development of quantum field theory. 1909 and 1916 – Einstein shows that, if Planck's law of black-body radiation is accepted, the energy quanta must also carry momentum p = h / λ, making them full-fledged particles.
This discovery of the wave–particle duality of matter and energy was fundamental to the later development of quantum field theory. 1909 and 1916: Albert Einstein: Showed that, if Planck's law of black-body radiation is accepted, the energy quanta must also carry momentum p = h / λ, making them fully fledged particles, albeit with no "rest ...
The p z orbital is the same as the p 0 orbital, but the p x and p y are formed by taking linear combinations of the p +1 and p −1 orbitals (which is why they are listed under the m = ±1 label). Also, the p +1 and p −1 are not the same shape as the p 0 , since they are pure spherical harmonics .
1955 - Emilio Segrè and Owen Chamberlain: Antiproton discovered; 1956 – Bruce Cork: Antineutron discovered; 1956 – Electron neutrino discovered; 1956–57 – Parity violation proved by Chien-Shiung Wu; 1957 - Many-worlds, also called the relative state formulation or the Everett interpretation. 1957 – BCS theory explaining superconductivity