
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
40,485 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:40 AM
ZapperZ

1 
40,832 
gravity is about magnetic field...Einstein says that massive objects cause a distortion in spacetime, which is felt...

T 07:32 PM
Gazi Kutbay

0 
22 
I am doing a research about the compact Milne Universe in two dimensions Using special relativity.
such that (t,θ)...

 
 
 
I know that you're going to probably say that a frame of reference doesn't make sense for light, but I've uploaded a...

Feb513 09:38 PM
Drakkith

4 
107 
For another BRS thread, I looked up some information at http://www.genealogy.ams.org/ and was completely sidetracked...

Mar110 05:00 PM
Chris Hillman

2 
123 
Although I can't nominate myself for a Nobel Prize, I was wondering I any distinguished scientist would oppose such a...

Feb1213 02:55 AM
kloptok

4 
145 
Thinking about how so much matter can be squeezed into a singularity, the answer (if I understand correctly) is that...

T 03:43 PM
phinds

5 
149 
I'll try rephrasing my question, as I do not wish to question the theory itself. Verily, verily, it would be...

Feb1613 04:19 PM
Didymus

4 
161 
A general summary of the experiment is that when the light clock is stationary on the platform it runs as normal, up...

T 04:35 PM
Nugatory

3 
165 
I was wondering why can't I use formulas from the "Special Relativity" in cases like:
F=mv^2/r Or F=qv•B...

Jul2214 12:56 AM
ghost313

2 
206 
Hello,
Some knows how to Bondi deduce his radiating line element? I read some papers and there isn't any hint about...

May414 07:21 PM
btphysics

2 
220 
Hi, I'm trying to understand why the metric I've seen for AdS space,...

Jan2414 11:38 AM
copernicus1

0 
220 
On the spacetime manifold in general relativity, one chooses a basis at a point and express it by the partial...

May1714 02:59 PM
Matterwave

2 
221 
I am somewhat distracted so this post will not be what it should, given that GAP is one of my interests.
For those...

Mar1110 05:17 PM
Chris Hillman

1 
222 
I'm reading an old article published by Kaluza "On the Unity Problem of Physics" where i encounter an expression for...

May1514 07:58 AM
Bill_K

3 
234 
would time dilation occur if for example, i was making a hydrogen atom spin with the center of spin the atom? would...

May1914 03:40 PM
mfb

1 
234 
This is about Hans Ohanian, "Einstein's E = mc2 mistakes," http://arxiv.org/abs/0805.1400 , a historical paper that...

Jan2314 06:03 PM
bcrowell

0 
235 
In my book it says that the Lorentz group O(3,1) includes 'discrete reversals of the time direction'.
What on earth...

May1814 10:21 PM
Aziza

3 
241 
In Bianchi IX, the isometry group is the group that admits the same lie algebra as the lie algebra of SO(3). What...

May1614 04:34 AM
befj0001

0 
242 
1. What exactly is the cosmological constant, what is its value (or how do you derive it if it is something that must...

Jul2214 09:43 PM
bcrowell

2 
244 
Hawking said that the horizon area of a black hole never decreases and illustrated that in his Hawking Are Theorem:
...

May1714 12:22 PM
PeterDonis

5 
245 
Hello,
I am working on a project but I stuck at a point. I found that divergence of two objects are equal...

Mar1214 05:17 AM
crimsonidol

0 
247 
In classical mechanics we can get a nice overview of the dynamics of a system by looking at its positionmomentum...

May414 03:12 PM
WannabeNewton

1 
248 
In classical mechanics we talk about homogeneous and inhomogeneous gravitational fields.
Do we do this with...

Feb514 09:35 AM
DaleSpam

1 
248 
I read recently that "...at present only GR theory predicts the required 13 parameters for agreement with critical...

Jun1214 09:57 AM
WannabeNewton

1 
248 
Hi,
I think I have several misconceptions about the theoretical framework of black holes, I'm just not sure where my...

Mar914 08:04 PM
sciencegem

2 
249 
I started attending to GR lectures, and there we referred to an intelingent beetle living on a 2D flat space and...

Apr1014 10:54 AM
ChrisVer

0 
251 
A couple of questions about this paper, which, unfortunately, I can't access in is entirety...

May2114 12:46 PM
Bill_K

2 
253 
Due to the diffeomorphism invariance of GR ##(M, g_{ab})## and ##(M, \phi_*g_ab)## represents the same physical...

Jan2814 08:37 AM
center o bass

0 
254 
when we use a change of reference

Oct1813 02:16 PM
DaleSpam

1 
255 
Hey, I read that if a fourvector is 'fourorthogonal' to a timelike four vector then it must be spacelike. I showed...

Mar1114 09:35 AM
Bill_K

1 
256 
Hi,
I am working through Section 5.8 of Sean Carroll's book on GR. Does someone know where I can find the bridging...

May1114 10:48 PM
PeterDonis

1 
259 
I'm getting pretty lost with how initial data works in general relativity.
Assuming the energy momentum tensor is...

Mar714 07:34 PM
WannabeNewton

1 
261 
Disclaimer: I have no formal education in physics.
I watched a TedTalk...

Jan2214 02:58 PM
mfb

1 
264 
Hey guys,
I am working on a computer simulation of our solar system and basically analyzing the affects of the...

Mar114 04:18 PM
muzz

0 
267 
Hello! I am interested in knowing the existing relation between the ADM Formalism and the WheelerdeWitt Equation.
...

Feb1114 10:16 AM
jesusrods

0 
271 
if we know the relations between time and distance at the moving frame and stationary frame why can't we derive the...

May314 12:09 PM
DaleSpam

4 
271 
I'm blanking on this at the moment, but a quick application of Noether's theorem would imply that, aside from the...

Mar914 05:21 AM
Ben Niehoff

1 
273 
Kevin Brown, in his excellent book "Reflections on Relativity" p. 409, "immediately" integrates 2 geodesic equations:...

Apr914 07:35 AM
Bill_K

1 
273 
In a spatially homogeneous model, spacetime is filled with a oneparameter set of invariant hypersurfaces H(t)....

May2014 06:03 AM
Bill_K

2 
273 
If gravitational waves cause fluctuations in space time, than could all gravitational waves, large or small all would...

Jan1614 03:32 PM
ilikescience94

0 
275 