Series02QuantumMechanics

Series02QuantumMechanics - Reading: Gray: (18) to (112)...

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Unformatted text preview: Reading: Gray: (18) to (112) OGC: (4.4) to (4.5) II-1 A Timeline of the Atom 400 BC 1800 400 B.C. Democritus: idea of an atom 1808 John Dalton introduces his atomic theory. 1820 Faraday: charge/mass ratio of protons 1885 E. Goldstein: discovers a positively charged sub-atomic particle 1898 J. J. Thompson nds a negatively charged particle called an electron. 1909 Robert Millikan experiments to nd the charge and mass of the electron. 1911 Ernest Rutherford discovers the nucleus of an atom. 1913 Niels Bohr introduces his atomic theory. 1919 The positively charged particle identiFed by Goldstein is found to be a proton. 1920s Heisenberg, de Broglie, and Schrdinger. 1932 James Chadwick Fnds the neutron. 1964 The Up, Down, and Strange quark are discovered. 1974 The Charm quark is discovered. 1977 The Bottom quark is discovered. 1995 The Top (and Fnal) quark is discovered. 1850 1900 1950 ....... ...... II-2 The Person Behind The Science Werner Heisenberg 1901-1976 With his help, the Max Planck Institute for Physics is founded (1948) Publishes his theory on quantum mechanics (1925, at the age of 23!) Moments in a Life Highlights Studied under Max Born, James Franck, and Niels Bohr Received Nobel Prize in Physics (1932) for for the creation of quantum mechanics II-3 e- (t=0) r r The Bohr model violates the uncertainty principle! The Modern Picture of the Hydrogen Atom e- (t=1) e- (t=0) e- (t=1) e- (t=4) e- (t=2) e- (t=3) e- (t=5) e- (t=6) The uncertainty in an electrons position is comparable to the diameter of the atom itself. Bohr Model Current Model x = 0; p = 0 so x p = 0 < ! e- (t=2) h 4 II-4 Uncertainty in Electron Momentum and Position e ?...
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This note was uploaded on 10/27/2010 for the course CH 1a taught by Professor Lewis during the Fall '08 term at Caltech.

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Series02QuantumMechanics - Reading: Gray: (18) to (112)...

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