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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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Feb23-13 08:40 AM
ZapperZ
1 37,501
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 37,235
I have a theory and I was wondering if there is either a chance it is true, or if the theory has already been...
Nov10-07 08:19 AM
Jorrie
15 2,786
I understand that light can be in an unstable orbit at Schwarzschild radial coordinate r=3M (geometric units) around a...
Nov10-07 02:47 AM
Jorrie
26 5,416
I don't really get GR. Why should curved space and time be a model for gravity? To me, curved space means a observers...
Nov9-07 05:14 PM
pmb_phy
13 4,551
Hi. I have a few questions. Is it theoretically possible to build a wormhole to a parallel or baby universe? Could...
Nov9-07 03:37 PM
pervect
5 2,368
Is the lorentz transformation an active transformation or a passive one?
Nov9-07 11:27 AM
Chris Hillman
3 2,950
I would appreciate if some learned folk could answer these questions to increase my understanding. 1. Does GR...
Nov9-07 12:32 AM
robphy
18 3,301
In his first Relativity paper on 1905 Jun 30, Einstein writes the following two versions of what he denotes as the...
Nov8-07 05:25 PM
RVHG(R.Valls)
0 1,024
http://www.nature.com/news/2007/071107/full/450147a.html
Nov7-07 09:26 PM
quantum123
0 942
Hello I am looking for a paper that discusses the mathematics behind the special/general theories of relativity. ...
Nov7-07 12:31 PM
Chris Hillman
4 1,971
Please tell me if there are motivated physical reasons to consider that combinations of dimensionless physical...
Nov7-07 03:39 AM
robphy
10 2,179
I'm not sure if this should go here, or in electrodynamics, or in relativity, but never mind. I'm given to understand...
Nov6-07 06:46 PM
geoffc
7 2,988
HI, Is space time influencing by the speed or the acceleration ? Here the following problem : Marc and lisa are on...
Nov6-07 05:52 AM
HallsofIvy
2 1,333
Hello everyone. I just kicked myself out of the philosophy section of the forums, and came here looking for some...
Nov5-07 07:01 PM
russ_watters
29 4,525
I ask this question because of conclusions from the following example. Two masses orbit one another. The masses...
Nov5-07 02:46 PM
pervect
8 2,479
if an electron is accelerated closer and closer to the speed of light, will its magnetic field grow forever or will it...
Nov5-07 11:37 AM
granpa
10 2,726
FREE FALL OF BODIES 3-body problem (special case) According to the Newton's Mechanics: Let us...
Nov5-07 09:13 AM
mike123
8 2,362
Okay, so the problem is that I'm supposed to analyze what the world would look like if the speed of light is 88 miles...
Nov4-07 09:42 PM
DaleSpam
4 1,474
Few weeks ago a respected magazine brought some excitement with a story on missing bond between Thermodynamics and...
Nov4-07 05:42 PM
pervect
24 5,656
Primary Goals of Thread: (1) Eliminate all unnecessary concepts (2) Focus solely on the physics Tom and Bill are...
Nov3-07 10:05 PM
rqr
41 7,609
Has it been shown that observed length contraction that occurs due to high relativistic speeds is any different from...
Nov3-07 09:31 PM
jtbell
6 2,885
Hi, I'm trying to show that electromagnetism and scalar field theories satisfy the DEC. I know how to find...
Nov2-07 08:20 PM
pervect
4 1,631
Ok, so I read about a thought experiment pertaining to special relativity in a book somewhere and the experiment was...
Nov2-07 11:06 AM
joyful55
3 2,868
Say 2 particles A and B. Particle A is stationary in this inertial reference frame. Particle B is moving with...
Nov2-07 02:35 AM
Shooting Star
14 2,225
why we do not observe any “lack of simultaneity” when we substitute sound signals for the light flashes in the...
Nov2-07 12:05 AM
pegasso
2 1,239
Supposedly nothing can travel faster than the speed of light because this would violate causality and produce...
Nov1-07 10:20 PM
meopemuk
51 16,002
Time invariance implies conservation of energy. Space invariance implies momentum convervation. What convervation...
Nov1-07 04:07 PM
arivero
9 2,032
A eprint on today's Physics ArXiv: Flat-space picture of gravity vs. General Relativity: a precision test for present...
Oct31-07 12:53 PM
Chris Hillman
5 2,303
Has Fizeau changed the direction of the water in his experiment? If no, wenn we change the direction of the water,...
Oct30-07 11:27 PM
cesiumfrog
2 1,602
As an example to demonstrate the relativity of simultaneous events Einstein used the train thought experiment. The...
Oct30-07 06:04 PM
Eli Botkin
21 3,419
i am a master's student and want to work on general relativity! does anybody have information on the most recent...
Oct30-07 08:53 AM
Dvin
4 2,005
what exactly are manifolds? I looked on wikipedia and I am getting the sense that its like n dimensional surface if...
Oct30-07 12:06 AM
zankaon
11 2,506
I had a question that I was hoping someone could answer for me. If light passes next to a massive rotating object...
Oct29-07 07:56 PM
cesiumfrog
3 2,462
Kinetic energy is 1/2mv^2, and velocity varies depending on velocity of the observer, so does kinetic energy also vary...
Oct29-07 07:09 PM
DaleSpam
8 2,921
Hello, does anybody know a proof of the equivalence (or differences) between the "total mass" integral \int T_munu...
Oct29-07 06:16 AM
fnesti
6 2,002
Can somebody explain the reason why the following reasoning is wrong? Considering a source of electromagnetic waves...
Oct29-07 03:04 AM
pervect
18 3,382
Do any theories of gravity exist other than general relativity that are capable of explaining the perihelion of...
Oct28-07 02:28 PM
Chris Hillman
6 2,620
Suppose that some relativistic field has energy density and momentum density. Integrating these, we get the total...
Oct27-07 05:48 PM
samalkhaiat
32 5,661
Now, if I'm not mistaken, from the Lorentz transformations one derives the following equations for time dilation and...
Oct27-07 04:20 PM
robphy
15 2,222
Situation A positive test charge q is moving parallel to a current-carrying wire with velocity v relative to the...
Oct27-07 10:11 AM
pmb_phy
3 3,119
My understanding is that in GR the way in which the components of the metric tensor can vary from location to location...
Oct27-07 02:58 AM
oldman
2 2,467

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