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I would like to comment that the essential conclusion of this article is actually wrong according to Davissons and Germers original articles. Since Davisson and Germer worked with low energy elektron diffraction, LEED, it is not possible to use the Bragg equation in the way given in the article. This is due to the wavelength dependent refraction index of the nickel crystal. âPreceding unsigned comment added by A.Silverstone ( talk ⢠contribs) 13:57, 16 May 2010 (UTC)
In the article Bragg-diffraction is still used to describe the experiment, whereas shortly after it is mentioned that Bragg's law can not be used to describe the experiment. â Preceding unsigned comment added by SourBitter ( talk ⢠contribs) 08:46, 30 April 2024 (UTC)
Some (at least superficial) description of the experiment should appear in the introductory paragraph. â Preceding unsigned comment added by 72.48.183.24 ( talk) 01:04, 15 June 2017 (UTC)
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It addresses the points in bold from the text taken from the article:
The experiment consisted of firing an electron beam from an electron gun directed to a piece of nickel crystal at normal incidence (i.e. perpendicular to the surface of the crystal). The experiment included an electron gun consisting of a heated filament that released thermally excited electrons, which were then accelerated through a potential difference giving them a certain amount of kinetic energy towards the nickel crystal. To avoid collisions of the electrons with other molecules on their way towards the surface, the experiment was conducted in a vacuum chamber. To measure the number of electrons that were scattered at different angles, an electron detector that could be moved on an arc path about the crystal was used. The detector was designed to accept only elastically scattered electrons.
Roshan220195 ( talk) 20:51, 3 July 2012 (UTC)