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Feb2313 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...

Dec3107 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...

Nov1007 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...

Nov1007 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...

Nov907 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...

Nov907 03:37 PM
pervect

5 
2,368 
Is the lorentz transformation an active transformation or a passive one?

Nov907 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...

Nov907 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...

Nov807 05:25 PM
RVHG(R.Valls)

0 
1,024 
http://www.nature.com/news/2007/071107/full/450147a.html

Nov707 09:26 PM
quantum123

0 
942 
Hello
I am looking for a paper that discusses the mathematics behind the special/general theories of relativity. ...

Nov707 12:31 PM
Chris Hillman

4 
1,971 
Please tell me if there are motivated physical reasons to consider that combinations of dimensionless physical...

Nov707 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...

Nov607 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...

Nov607 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...

Nov507 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...

Nov507 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...

Nov507 11:37 AM
granpa

10 
2,726 
FREE FALL OF BODIES
3body problem (special case)
According to the Newton's Mechanics:
Let us...

Nov507 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...

Nov407 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...

Nov407 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...

Nov307 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...

Nov307 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...

Nov207 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...

Nov207 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...

Nov207 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...

Nov207 12:05 AM
pegasso

2 
1,239 
Supposedly nothing can travel faster than the speed of light because this would violate causality and produce...

Nov107 10:20 PM
meopemuk

51 
16,002 
Time invariance implies conservation of energy. Space invariance implies momentum convervation. What convervation...

Nov107 04:07 PM
arivero

9 
2,032 
A eprint on today's Physics ArXiv: Flatspace picture of gravity vs. General Relativity: a precision test for present...

Oct3107 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,...

Oct3007 11:27 PM
cesiumfrog

2 
1,602 
As an example to demonstrate the relativity of simultaneous events Einstein used the train thought experiment. The...

Oct3007 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...

Oct3007 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...

Oct3007 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...

Oct2907 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...

Oct2907 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...

Oct2907 06:16 AM
fnesti

6 
2,002 
Can somebody explain the reason why the following reasoning is wrong?
Considering a source of electromagnetic waves...

Oct2907 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...

Oct2807 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...

Oct2707 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...

Oct2707 04:20 PM
robphy

15 
2,222 
Situation
A positive test charge q is moving parallel to a currentcarrying wire with velocity v relative to the...

Oct2707 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...

Oct2707 02:58 AM
oldman

2 
2,467 