ELECTRON PHYSICS
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CHAPTER
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1. THE CHARGE OF THE ELECTRON…...............…..
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Introduction. An early method of measuring the charge of the
electron.
The oil—drop method. Comparison With the X-ray value.
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The thermionic method.
The charge of the alpha particle. The
”faraday.
Brownian movements.
Avogadro’s number from Brown__
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ian movements.
X-ray method. Experiments.
2. THE MASS_OF THE ELECTRON.............-..-....…..
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Cathode rays.
The method of ]. ]. Thomson to measure e/m.
The
method of Lenard.
K‘irchner’s modication of the Wiechert method.
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Units of energy, velocity ”and momentum. There are many other
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e/r methods. The Dunnington method. The magnetron of Hull.
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The_helical method. Spectroscopie determinations of e/m- The
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mass of the electron. ' Experimehts.
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3. THE WAVE—LENGTH OF THE ELECTRON
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Introduction.
De Broglie’s equation. ‘The reecti0n
slow eleC—trons from single crystals. The diEraction of light and x-rays.
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The diffraction of electrons. The index of refraction of metals for
electron Waves. Surface
The diffraction of fast electrons by
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thin lms." The dualistic
the electron.
The uncertainty
principle. ; The Wave natureof heavier particles. Experiment“.
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PHOTOELECTRIC EMISSION
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‘._1_……
number of “electrons emitted. Measurement…
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of the sensitivity dryield. Practical units. Th—çme factor. Gur—_»
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ï
curves.
The energy of
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The duàl_
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radiant energy. Quantum equivalence- and pho'toelec- '
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Einsteinîs
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