XXth century_physics

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Important events in early atomic <strong>physics</strong> 1909 Geiger & Marsden - results on α scattering by thin foils 1910 Haas - first atomic model containing Planck’s constant h 1910 Thomson - theory of scattering in the ”plum pudding” model 1911 Rutherford - nuclear atom model 1913 Van den Broek - atomic number = nuclear charge Z 1913 Van den Broek - nuclear electrons 1913 Bohr - planetary atom model 1913 Franck-Hertz experiment 1913 Geiger & Marsden - confirmation of Rutherford’s theory 1913 Moseley - frequencies of characteristic X radiation 1913 Fajans, Soddy - displacement law for radioactive decays 1913 Soddy - isotopes 1914 Chadwick - continuous spectrum of electrons in β decay 1916 Sommerfeld - extension of Bohr’s model 1921 Stern-Gerlach experiment 1922 Compton effect - scattering of X rays on free electrons 1923 de Broglie - matter waves
Charles Glover Barkla (1877-1944) discovered characteristic X radiation of the elements Max von Laue (1979-1960) together with Walter Friedrich and Paul Knipping discovered diffraction of X-rays by crystals William Henry Bragg (1862-1942) William Lawrence Bragg (1890-1971) initiated the analysis of crystal structure by X-rays (Bragg formula for reflection)
Page 1 and 2: Physics of the XX th century Part 1
Page 3 and 4: Physics of the atom and the path to
Page 5 and 6: Hantaro Nagaoka Nagaoka's atomic mo
Page 7: Robert Millikan (1868-1953 (1868 19
Page 11 and 12: John William Nicholson (1911): atom
Page 13 and 14: Accelerated electric charge radiate
Page 15 and 16: Attenuation of radiation for rings
Page 17 and 18: Solvay Conference 1913
Page 19 and 20: H. Geiger - On the Scattering of th
Page 21: Proc. Roy. Soc. 82, 495 (1909)
Page 24 and 25: In the ”plum-pudding” model of
Page 26 and 27: "Consider an atom which contains a
Page 28 and 29: ”...considering the enormous vari
Page 30 and 31: ”The wavelengths of the first fou
Page 32 and 33: Spectral lines were seen as manifes
Page 34 and 35: In the Bohr’s model spectral line
Page 36 and 37: Bohr found excellent description of
Page 38 and 39: Periodic system of elements accordi
Page 40 and 41: Periodic system of elements accordi
Page 42 and 43: Intra-atomic Charge ”Now, accordi
Page 44 and 45: H. G. J. Moseley, Phil. Mag. 26, 10
Page 46 and 47: ”We have here a proof that there
Page 48 and 49: James Franck Gustav Hertz Franck-He
Page 50 and 51: James Franck Gustav Hertz ”...it
Page 52 and 53: Wojciech (Adalbert) Rubinowicz (188
Page 54 and 55: Solvay Conference 1921
Page 56 and 57: Arthur Holly Compton (1892-1962) Co
Page 58 and 59:
Compton’s data [(Phys. Rev.19, 26
Page 60 and 61:
Compton effect
Page 62 and 63:
The crisis of the quantum theory
Page 64 and 65:
Louis de Broglie
Page 66 and 67:
Clinton Davisson and Lester Germer
Page 68 and 69:
George P. Thomson Electron diffract
Page 70 and 71:
Important dates in the development
Page 72 and 73:
Heisenberg to Pauli (July 9, 1925)
Page 74 and 75:
”It is well known that the formal
Page 76 and 77:
”In this communication I wish fir
Page 78 and 79:
The uncertainty principle
Page 80 and 81:
”I used to take long walks on Sun
Page 82 and 83:
”The fact that the variables used
Page 84 and 85:
”A recent paper by the author may
Page 86 and 87:
"It thus appears that we must aband
Page 88:
Solvay Conference 1930
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