Talk:Stark effect

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give the details of stark effect—Preceding unsigned comment added by 202.176.248.70 (talk • contribs)

Splendid idea. Unfortunately, I don't understand the details of Stark Effect. Do you perhaps? Anyone can contribute of course! Oh, and next time, please sign your comments with four tildes: ~~~~. We can then see who is giving the comment. The result is somewhat like this: Gerritholl 20:05, 21 Oct 2004 (UTC)
Unless someone beats me to it, I'll write up what the effect is. I'll just add it to the bottom of my to do list... Laura Scudder 01:26, 4 Mar 2005 (UTC)

Contents

[edit] Quantum confined Stark effect

Discussion of the quantum-confined Stark effect (QCSE) needs to be expanded. Is it worth an article in itself?

[edit] Unclear phrase

What does the phrase below mean? It needs to be made clearer.

so the exciton is not merely pulled apart by the field

[edit] History Stark effect

  • Could somebody provide a source for the following sentence (which I temporarily commented out):
While first-order perturbation effects for the Stark effect in hydrogen are in agreement for the Bohr-Sommerfeld model and the quantum-mechanical theory of the atom, higher order effects are not. Measurements of the Stark effect under high field strengths confirmed the correctness of the quantum theory over the Bohr model.
  • I do not have easy access to Z. f. Physik (1920). Whitaker gives p. 199 for Kramer's 1920 paper. Earlier author of this article gives p. 169. Who is right?

--P.wormer 15:47, 16 February 2007 (UTC)

  • I got the answer for the 2nd question from the national Dutch public library helpdesk (al@din): it is page 199. Thank you al@din! --P.wormer 13:52, 21 February 2007 (UTC)

[edit] Drawing

The explanation of the drawing of the Stark splitting requires introduction of parabolic coordinates and discussion of the Schr. eq. in terms of these coordinates. To my taste this goes (too) far. Either we omit the drawing, or we introduce parabolic coordinates+discussion. Any opinions? --P.wormer 09:28, 18 February 2007 (UTC)

I believe it is useful to have a graphical representation of the stark effect illustrating the effect of an electric field on atomic energy levels. The caption does include a lot of unexplained information, I included the full details for completeness.
It may be more useful with a simple caption (for example see Atomic_line_filter#Relevant_phenomena) as the form of the curves illustrates the essential points: breaking of the degeneracy and shifting of the energy levels. Anyone can of course edit the caption.
The fact that a new quantum number is required to describe the (otherwise degenerate) energy levels in an electric field is important and can be understood conceptually without any knowledge of parabolic coordinates or the Schrodinger equation. For anyone who wishes the look further, there are extensive articles on both.
It may be better to use a simpler schematic diagram as in Zeeman_effect#Introduction, however I think it is nice to see the form of the energy shift.--DJIndica 00:43, 25 February 2007 (UTC)
<<PROPOSED ALTERATION>> I have created a new diagram, it is displayed with a new caption in my sandbox. Comments/suggestions would be appreciated, if I receive none I will transfer it to Stark effect in the near future.--DJIndica 20:16, 1 March 2007 (UTC)
Done, comments welcome.--DJIndica 22:45, 4 March 2007 (UTC)

[edit] Trivia

The article states: "Coincidentally, both physicists, Stark and Lo Surdo, later became ardent followers of the dictators (Hitler and Mussolini) ruling their respective countries." How is this in any way significant or relevant? It seems totally out of place to me.

Agreed. — Laura Scudder ☎ 21:01, 17 May 2007 (UTC)
  • I wrote this sentence assuming that human interest is not forbidden, not even in science. In science history there is an eternal struggle on how to divide attention between the works and the personalities of scientists. To me a sentence of 20 words not directly science related in an otherwise completely technical article is not overstretching the personal. But, indeed, the Johannes Stark lemma has already a paragraph about Stark's political ideas. So, when Antonino Lo Surdo gets an article that mentions (however briefly) his political ideas, then the sentence can go from the present article. Until then I am in favor of reentering the sentence.--P.wormer 08:31, 18 May 2007 (UTC)

I re-entered the sentence about the political beliefs of Stark and Lo Surdo (now with reference to a peer-reviewed journal). If somebody wants to delete it again, then I ask him/her to ponder the following. (i) An encyclopedia is a collection of facts. (ii) For Wikipedia size is not an issue, in contrast to a paper encyclopedia. (iii) Why and in what manner will it improve Wikipedia if this sentence is deleted? Please explain this before deletion. (iv) Who determines relevance? For instance, I took great care to collect the titles of the articles that the present lemma refers to. Is this relevant? I think so, but others may disagree. Those who don't care about titles can simply ignore them. Why bother to delete them or anything else that is true and has bearing on the subject?--P.wormer 15:36, 20 May 2007 (UTC)

[edit] fine structure

Christovac changed a sentence of mine to:

Kramers also included the effect of fine structure, by which, before the discovery of spin in 1926, was the relativistic increase of electron mass with velocity.

In the original version of this sentence I wanted to express the fact that after 1926 the term "fine structure" related to spin effects. Around 1919 by "fine structure" one meant [is this bad grammar?] the relativistic effect of increase in mass. Is there a stylistic expert in the Wiki-room that can put this sentence straight? Now it is rambling. Thank you.--P.wormer 07:45, 30 May 2007 (UTC)

OK, did it myself--P.wormer 13:00, 9 June 2007 (UTC)

[edit] Question about Electric Field NMR

Is the Stark effect etc related to Electric field NMR? If so please edit that stub article, and add references from this and related articles. I know nothing about it. GilesW (talk) 19:48, 12 May 2008 (UTC)