Talk:Davisson–Germer experiment

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Comment

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. —Preceding unsigned comment added by A.Silverstone (talk • contribs) 13:57, 16 May 2010 (UTC)

This comment was right; I have corrected it. In fact the Bragg equation is never right for electron diffraction, at best close. Ldm1954 (talk) 22:18, 17 May 2023 (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. — Preceding unsigned comment added by SourBitter (talk • contribs) 08:46, 30 April 2024 (UTC)

Comment

Some (at least superficial) description of the experiment should appear in the introductory paragraph. — Preceding unsigned comment added by 72.48.183.24 (talk) 01:04, 15 June 2017 (UTC)

Image

Check if the image is alright.

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.

Experimental setup

Roshan220195 (talk) 20:51, 3 July 2012 (UTC)

Looks good to me. Go ahead and add it. --Chetvorno^TALK 21:51, 4 July 2012 (UTC)

Looks like no-one has objected, and I agree that it illustrates what is described. I have removed the reqdiagram tag. Egmason (talk) 09:18, 24 September 2014 (UTC)