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Special & General Relativity

- Dependence of various physical phenomena on relative motion of the observer and the observed objects. Exp. & theo. theories of relativity
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Common Relativity questions, quality answers
Jul24-14 09:06 AM Greg Bernhardt 
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Jan16-12 Greg Bernhardt
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...
Dec31-07 02:06 AM
jtbell
0 42,151
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:40 AM
ZapperZ
1 42,498
I'm new to relativity and have only seen a few things but from what I have seen has lead me to wonder. My question is:...
Feb4-04 09:15 PM
binaryblade
8 1,517
Hello, this is my first post. Some years back i read a book about einstein works. Among many things in the book, i...
Feb5-04 02:19 PM
Phobos
17 3,601
If your in a ship traveling at the speed of light towards a planet and you are standing in the middle of the ship,...
Feb5-04 02:22 PM
Phobos
27 2,768
http://www.nature.com/nsu/010614/010614-6.html Einstein's theory of relativity tells us that gravity bends space....
Feb5-04 02:41 PM
LURCH
2 2,578
There is often talk of mass and energy in this forum. I tend to use the notion of relativistic mass myself since I...
Feb6-04 04:56 PM
Phobos
23 2,810
Help me please! do'nt know if i'm right here, but any hint leading to a simple answer of the following question would...
Feb6-04 05:46 PM
Nereid
36 11,600
I've just made a new page for the GR portion of my web site. In it I derived Einstein's field equation but with a...
Feb7-04 09:10 AM
Phobos
7 2,334
There is a couple of questions that have arisen after i read about the general theory of relativity. 1. Should it...
Feb7-04 11:11 PM
Stingray
26 6,232
I have raised this issue in a different manner before - but never got a satisfactory analysis. In the traditional...
Feb8-04 12:24 PM
yogi
7 1,657
In 1906 Einstein utilized the center-of-mass theorem to derive an expression for the inertia of energy and an...
Feb8-04 07:00 PM
pmb_phy
6 5,552
i know that gravity can bend light so from this principle i have two theoretical questions. first, can light bend...
Feb9-04 09:04 AM
pmb_phy
2 4,240
I am attemting to help my son with a Physics problem, and it has been 20 years since my last Physics class. I would be...
Feb9-04 06:49 PM
Bigniko
0 1,310
I went over this with someone here a while ago and I think they became exhausted with me. Anyway, I went away to think...
Feb10-04 06:43 AM
DW
18 3,158
Here is one that's been bugging me a lot: Observer A is zooming along in a very fast car at 0.995c. The "rest...
Feb10-04 06:58 PM
pmb_phy
29 2,525
arXiv:astro-ph/0301184 v3 27 Jan 2003 The phase coherence of light from extragalactic sources direct evidence...
Feb12-04 08:57 AM
wolram
0 1,372
I have a straight forward question that hopefully somebody can answer. In SR, does the relativistic mass of an...
Feb13-04 10:53 AM
AWolf
12 1,367
http://www.npl.washington.edu/eotwash/gconst.html Recently the value of G has been called into question by new...
Feb13-04 11:22 AM
wolram
0 1,327
arXiv:physics/0307003 v1 1 Jul 2003 . GRAVITY AS QUANTUM FOAM IN-FLOW Reginald T.Cahill School of Chemistry,...
Feb13-04 12:02 PM
wolram
0 1,136
this was a new post today http://arxiv.org/astro-ph/0401244 it is still just a germinal idea remember in 1998...
Feb13-04 01:42 PM
Phobos
18 1,767
if space is expanding and we take it that it is quantasized into planckian units of invariant dimensions what is the...
Feb13-04 04:27 PM
meteor
1 1,452
I was thinking in the feasibility of constructing an apparatus that can inform you about what's the metric of the zone...
Feb13-04 05:16 PM
meteor
0 1,104
ok, thought of something here, tell me what you think.......... if time were to slow down or speed up or stop all...
Feb13-04 06:34 PM
LURCH
3 1,173
An article published today at http://spaceflightnow.com/news/n0402/11lens/ stated that "Einstein's general theory of...
Feb14-04 02:34 PM
RMDumse
1 1,844
First of all let me say Hello! as this is my first post. I am a biologist, and have been reading over the very basics...
Feb14-04 09:06 PM
Sammywu
122 6,149
I don't recall what thread it was in but there was a comment that F = ma for a relativistic mass. I stated it was...
Feb15-04 10:06 AM
Nudnik
1 3,907
A commonly accepted modern SR/Gr statement is "timelike geodesics are maxima of the proper time". I really shall...
Feb16-04 05:31 AM
pmb_phy
7 1,825
Was not the Special Theory of Relativity and the Lorentz Transformation created simply to explain why the...
Feb16-04 03:02 PM
Integral
4 1,530
Stephen Hawking and the No Boundary Proposal The no boundary proposal has been around for quite some time now,...
Feb17-04 11:44 AM
Vast
2 5,698
Davis and Lineweaver "Expanding Confusion: common misconceptions of cosmological horizons and the superluminal...
Feb17-04 12:00 PM
DrChinese
10 1,743
Ok. I have a question on SR/GR with regards to Einstein. How did he come up with this? That's what I don't...
Feb17-04 12:07 PM
pmb_phy
5 2,516
I am reading a book called Simply Einstein...it wonderfully helps a novice understand Einstien's theory or relativity....
Feb17-04 01:41 PM
gnome
7 1,548
http://arxiv.org/abs/astro-ph/0401136 The theory of Self Creation Cosmology is described and found to be as...
Feb18-04 12:06 PM
marcus
2 1,504
http://doc.cern.ch//archive/electronic/gr-qc/0402/0402009.pdf A perspective on Quantum Gravity Phenomenology1 ...
Feb18-04 12:14 PM
wolram
4 1,069
arXiv:gr-qc/0401102 v1 26 Jan 2004 A New Approach in Quantum Gravity and its Cosmological Implications Simone...
Feb18-04 01:39 PM
wolram
2 1,207
It's known and experimented when you shoot a light beam upward from Erath surface to a light detector at higher...
Feb18-04 06:19 PM
Sammywu
17 3,699
Im doing a project this yr on the title in the subject and i have been struggling to find imformation on this problem...
Feb19-04 04:34 AM
beardless2
3 2,267
Just got 2 hours to kill, I noticed this at the gravity probe B website FAQ webpage. *** Can space exist by...
Feb21-04 07:48 AM
meemoe_uk
0 1,354
Hi All, Probably some of you have seen papers relating Woodward research of the origin of Gravity and Mach's...
Feb23-04 05:58 AM
TeV
6 1,699
I have seen a derivation of the dependence of the speed of light inside a Schwarschild space-time: c depends on the...
Feb25-04 03:01 AM
hellfire
6 2,110
Suppose we have a closed/periodic universe (t,x) ~ (t,x+L) where L is the circumference of universe. Jack and Jill set...
Feb25-04 11:44 AM
beardless2
0 1,804

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