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

Dec3107 02:06 AM
jtbell

0 
37,149 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:40 AM
ZapperZ

1 
37,394 

 
 
 

 
 
 
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 
76 
Suppose you were to board a ship on Earth departing for a star system 1,000 light years away. You accelerate at 1g...

T 03:06 PM
Camel_City

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94 
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 
100 
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 
125 
In Steven Weinberg "gravitation and cosmology principles and applications of the general theory of relativity"...

T 09:27 AM
nenyan

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125 
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 
135 
Im reading about Coulombs law in my textbook.
It states that:
"The forces between to charged particles are...

Y 10:47 AM
UltrafastPED

1 
135 
This is the second question in the BRS feedback poll. It has four possible answers; please check the box which best...

Aug1510 11:56 AM
Chris Hillman

0 
165 
Hello,
Im interested in surface gravity of Kerr black hole it means, I need to find killing vector for Kerr which...

Apr1514 09:33 AM
Vrbic

2 
174 
If I am not mistaken, the change of the minkowski metric to:
n_{\mu\nu} \rightarrow g_{\mu\nu}(x)
will violate the...

Apr1414 08:10 PM
Geometry_dude

4 
174 
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 
177 
Hi, I'm trying to understand why the metric I've seen for AdS space,...

Jan2414 11:38 AM
copernicus1

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182 
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

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186 
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 
196 
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

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197 
Hi, this might be a silly question, but it does confuse me when I read about general relativity. From what I know...

Y 12:10 PM
jtbell

2 
197 
when we use a change of reference

Oct1813 02:16 PM
DaleSpam

1 
202 
This came up while I was trying to research the interaction of an electromagnetic plane wave with a dielectric slab,...

Apr1214 04:16 PM
universal_101

2 
209 
So, there's a paper here that I'm a bit confused about. On pages 3 and 4, it talks about energy density magnitude and...

Apr1414 08:22 PM
MattRob

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217 
Sorry if this turns out to be a colossally stupid question. I'm a newbie.
But since light has a constant speed in...

Apr714 05:42 PM
Nugatory

2 
221 
Disclaimer: I have no formal education in physics.
I watched a TedTalk...

Jan2214 02:58 PM
mfb

1 
222 
Kevin Brown, in his excellent book "Reflections on Relativity" p. 409, "immediately" integrates 2 geodesic equations:...

Apr914 07:35 AM
Bill_K

1 
224 
With Δt = γ ( Δt' + v Δx' ) For calculating delta t for stationary twin with values of traveling twin.
Is it...

Jan2514 12:35 AM
morrobay

2 
225 
Hello! I am interested in knowing the existing relation between the ADM Formalism and the WheelerdeWitt Equation.
...

Feb1114 10:16 AM
jesusrods

0 
225 
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 
226 
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 
227 
In classical mechanics we talk about homogeneous and inhomogeneous gravitational fields.
Do we do this with...

Feb514 09:35 AM
DaleSpam

1 
228 
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

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228 
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 
230 
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 
230 
https://www.youtube.com/watch?v=c3fJRRCAIdk This is a video of the 'barking dog' chemistry experiment captured with a...

Mar2414 06:57 PM
russ_watters

1 
234 
Tensors can be of type (n, m), denoting n covariant and m contravariant indicies. Rank is a concept that comes from...

Jan2414 09:50 PM
jcsd

4 
236 
For those who use GRTensorII, here is a simple and effective method for
determining the Lie algebra of Killing...

Mar210 12:10 PM
Chris Hillman

2 
237 
Is there any standard way for measuring the metric tensor. Does it require the a priori specification of a coordinate...

May2711 03:31 PM
PAllen

2 
240 
Hello PF:
I noticed a thread on PF in which TOM STOER and others were discussing how to calculate the redshift...

Aug1313 06:26 AM
Mentz114

12 
240 
If gravitational waves cause fluctuations in space time, than could all gravitational waves, large or small all would...

Jan1614 03:32 PM
ilikescience94

0 
240 
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 
240 