Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
27
Early Quantum Theory and Models of the Atom
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27-1: Discovery of the Electron
27-2: Blackbodies; Planck's Quantum Hypothesis
27-3 and 27-4: Photons and the Photoelectric Effect
27-5: Compton Effect
27-6: Pair Production
27-8: Wave Nature of Matter
27-9: Electron Microscope
27-11 and 27-12: Spectra and the Bohr Model

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 45
Q

Calculate the de Broglie wavelength of an electron if it is accelerated from rest by 35,000 V as in Fig. 27–2. Is it relativistic? How does its wavelength compare to the size of the “neck” of the tube, typically 5 cm? Do we have to worry about diffraction problems blurring the picture on the CRT screen?

Cathode rays deflected by electric and magnetic fields. (See also Section 17–11 on the CRT.)
Figure 27-2 Cathode rays deflected by electric and magnetic fields. (See also Section 17–11 on the CRT.)
A
6.5×1012 m6.5 \times 10^{-12} \textrm{ m}
Giancoli 7th Edition, Chapter 27, Problem 45 solution video poster
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