Talk:Four-momentum
From Wikipedia, the free encyclopedia
 |
This article is within the scope of WikiProject Physics, which collaborates on articles related to physics. | |
| Start | This article has been rated as Start-Class on the assessment scale. | |
| High | This article is on a subject of High importance within physics. | |
|
This article has been rated but has no comments. If appropriate, please review the article and leave comments here to identify the strengths and weaknesses of the article and what work it will need. |
||
You can find some info here: [1].
Also note that are two conventions:
- Take c = 1. In that case x = t, E = m = P etc.
- Keep on classical units of time and space and take x = c*t so c keeps its MKS\CGS value (MKS refrenced on the International System of Units page). I formulated my addition according to that convension.
Both are valid and should be appeared in the article. MathKnight 21:54, 16 Mar 2004 (UTC)
[edit] Excuse me?
In special relativity, four-momentum is a four-vector that replaces classical momentum; the four-momentum of a particle is defined as the particle's mass times the particle's four-velocity.
The highlighted sections mean nothing to the layman. And if you're not a layman and know all about four-momentum, then why did you come here? User:70.25.138.179|70.25.138.179]]
- I did some major rejiggering of the article -- expanded the intro and divided the rest up into sections. Hopefully I've addressed your concerns about incomprehensibility! Please comment again if it's still too obscure. HEL 02:56, 5 November 2006 (UTC)
[edit] Merge to momentum
Why is this tag there? Shouldn't the person who put that tag up have discussed their reasoning? Anyway, I disagree. The four-momenum concept is very distinct from momentum, and it needs its own page. Fresheneesz 11:35, 21 May 2006 (UTC)
[edit] Sign convention for the metric
Should we comment somewhere that there are two different sign conventions for the metric? This article uses the East Coast / general relativity convention; most particle physics texts these days use the West Coast metric, so that p2 = +m2 (c=1). HEL 18:32, 9 February 2007 (UTC)
