Talk:Precision tests of QED

Under construction![edit]

I'll be adding more to this article in the next few days. Help is always welcomed! HEL 14:46, 2 February 2007 (UTC)[reply]

The following subsections need to be expanded:

Anomalous magnetic dipole moments - there's an update in a 2006 New Scientist article. --> left my notes on campus by mistake; will try to expand this later.
Positronium - explain. --> done.
Condensed matter. --> expanded a bit; condensed-matter expert needed.

I'll be trying to put in some work on these in the next few days. HEL 02:37, 3 February 2007 (UTC)[reply]

I'm more or less done for now. HEL 00:07, 12 February 2007 (UTC)[reply]

Note: Data for value for Alpha was based on bad data in Feb 07 [Gabrielse et al]

 Old 1/Alpha: 137.035999710 (+/-96)

New (erratum June 2007): 1/Alpha: 137.035999068 (+/-96)

               The main article has not been updated  —Preceding unsigned comment added by 212.183.136.193 (talk) 13:29, 9 November 2007 (UTC)[reply]

units[edit]

In the lead we have

after special relativity which currently is tested [1] to 10^-21 etc.

10^-21 what? Do these quantaties have units, are they ratios. Without units the first line is meaningless. --Salix alba (talk) 00:51, 26 January 2008 (UTC)[reply]

NIST Experiments Challenge Fundamental Understanding of Electromagnetism[edit]

NIST Experiments Challenge Fundamental Understanding of Electromagnetism (27 Nov 2012). Briefly, the last electron in an otherwise-completely ionized atom of titanium or iron, emits a photon of the wrong energy when falling back to the lowest orbital after excitement. --96.233.96.211 (talk) 00:29, 4 December 2012 (UTC)[reply]

1σ[edit]

“[…]the value of α obtained here is within one standard deviation of that found from the electron's anomalous magnetic dipole moment, an agreement to within ten parts in a billion.”

Huh? 137.035 999 070 (98) vs. 137.035 998 78 (91)—that does not look like 1σ, but like a highly significant difference? --Chricho ∀ (talk) 15:29, 13 December 2012 (UTC)[reply]

Oops, misread it, of course that is 1σ. --Chricho ∀ (talk) 18:34, 9 July 2013 (UTC)[reply]