Davisson-Germer experiment

Louis de Broglie discussed the relations between energy, momentum, and wavelength for photons as well as for electrons and examined the results of the Davisson-Germer experiment on the diffraction of electrons by crystals, which were in perfect agreement with theory. 

FIGURE 4.21 Results of the Davisson-Germer experiment showing (a) the sin 9 dependence predicted by Bragg s law and (b) the dependence of the scattered intensity on the square root of the incident electron energy. 

The observation from the Davisson-Germer experiment that electrons have wave properties led to the development of the electron microscope (Figure 12.11) An electron beam is passed through a series... 

At the time of Chadwick s discovery, the Davisson-Germer experiment was five years old, and the wavelike... 

De Broglie s insight and the Davisson-Germer experiment ultimately pointed out that matter has wave properties. For large pieces of matter, the wave properties can be ignored, but for small pieces of matter like electrons, they cannot be. Because classical mechanics did not consider matter as waves, it was inadequate to describe the behavior of matter. 

The Davisson-Germer experiment, which has since been repeated with other particles (including molecular hydrogen), shows clearly that particles have... 

Fii 9.6 In the Davisson-Germer experiment, a beam of electrons was directed on a single crystal of nickel, and the scattered electrons showed a variation in intensity with angle that corresponded to the pattern that would be expected if the electrons had a wave character and were diffracted by the layers of atoms in the solid. 

Criterion 3 Importance of Davisson-Germer Experiments and Their Struggle to Interpret Experimental Data. Of the 128 textbooks analyzed none described Satisfactorily (S) the difficulties involved in interpreting the Davisson-Germer experiments as evidence for the wave nature of the electron (see Table 2). Only one textbook came close to describing the unexpected diffraction patterns in the following terms and was classified as Mention (M) ... 

A sample of nickel [in Davisson-Germer experiments] was accidentally converted into crystalline form and, when subjected to the electron beam, produced totally unexpected diffraction patterns. .. similar to those observed in X-ray diffraction by crystals. .. Such behavior indicated that electrons, like electromagnetic radiation, possess wave characteristics (O Connor 1974, p. 50). 

Separately, the photoelectric effect and the Compton effect experiments unambiguously demonstrated that Ught photons behave like particles do. And around the same time the Davisson-Germer experiments showed how electrons exhibit wave properties. 

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