XXth century_physics
XXth century_physics XXth century_physics
By complicated reasoning Nicholson concluded that in all primary atoms the angular momentum assumed values which were integral multiples of h/2π. For protofluorine the ratio of the potential energy of the electron ring to the rotational frequency ν (5m e a 2 2πν 2) /ν equals numerically ≈ 25 h, and this ratio corresponded to 2π times the value of the angular momentum of the electron ring. ”If, therefore, the constant h of Planck has, as Sommerfeld has suggested, an atomic significance, it may mean that the angular momentum of an atom can only rise or fall by discrete amounts when electrons leave or return. It is readily seen that this view presents less difficulty to the mind than the more usual interpretation, which is believed to involve an atomic constitution of the energy itself.” Nicholson (1912)
Accelerated electric charge radiates energy, hence atoms lose energy and cannot be stable
- 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 and 8: Robert Millikan (1868-1953 (1868 19
- Page 9 and 10: Charles Glover Barkla (1877-1944) d
- Page 11: John William Nicholson (1911): atom
- 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
By complicated reasoning Nicholson concluded that in all<br />
primary atoms the angular momentum assumed values which<br />
were integral multiples of h/2π. For protofluorine the ratio of the<br />
potential energy of the electron ring to the rotational frequency ν<br />
(5m e a 2 2πν 2) /ν equals numerically ≈ 25 h, and this ratio<br />
corresponded to 2π times the value of the angular momentum of<br />
the electron ring.<br />
”If, therefore, the constant h of Planck has, as Sommerfeld has<br />
suggested, an atomic significance, it may mean that the angular<br />
momentum of an atom can only rise or fall by discrete amounts<br />
when electrons leave or return. It is readily seen that this view<br />
presents less difficulty to the mind than the more usual<br />
interpretation, which is believed to involve an atomic constitution<br />
of the energy itself.”<br />
Nicholson (1912)
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