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

Dec3107 02:06 AM
jtbell

0 
37,220 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:40 AM
ZapperZ

1 
37,485 

 
 
 
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 
78 
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 
101 
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

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128 
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

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139 
Hello Physics Forums!
I'll try to cut right to the chase. I'm studying both length contraction and time dilation in...

Apr2214 11:45 PM
ghwellsjr

2 
155 
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

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165 
As all of you, I like to think about why and how Things happen; and as all of you I often feel frustrated by just how...

Apr2114 07:07 AM
Fredrik

2 
178 
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 
179 
Hi, I'm trying to understand why the metric I've seen for AdS space,...

Jan2414 11:38 AM
copernicus1

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185 
Suppose you were to board a ship on Earth departing for a star system 1,000 light years away. You accelerate at 1g...

Apr1814 03:06 PM
Camel_City

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190 
Hey all, first I just want to say that I am by no means a physicist  just someone that is very interested in physics,...

Apr2214 08:21 PM
ghwellsjr

1 
196 
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 
199 
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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200 
Hey everyone. I found a pretty good paper on Kaluza–Klein reduction here. However, I am having a hard time deriving...

Apr1914 11:55 AM
smiller

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200 
In Steven Weinberg "gravitation and cosmology principles and applications of the general theory of relativity"...

Apr1814 09:27 AM
nenyan

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201 
when we use a change of reference

Oct1813 02:16 PM
DaleSpam

1 
203 
Im reading about Coulombs law in my textbook.
It states that:
"The forces between to charged particles are...

Apr1714 10:47 AM
UltrafastPED

1 
204 
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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215 
Disclaimer: I have no formal education in physics.
I watched a TedTalk...

Jan2214 02:58 PM
mfb

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224 
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 
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 
228 
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 
229 
Hello! I am interested in knowing the existing relation between the ADM Formalism and the WheelerdeWitt Equation.
...

Feb1114 10:16 AM
jesusrods

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229 
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 
229 
In classical mechanics we talk about homogeneous and inhomogeneous gravitational fields.
Do we do this with...

Feb514 09:35 AM
DaleSpam

1 
230 
Kevin Brown, in his excellent book "Reflections on Relativity" p. 409, "immediately" integrates 2 geodesic equations:...

Apr914 07:35 AM
Bill_K

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 
231 
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 
233 
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 
235 
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 
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 
238 
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 
238 
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 
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 
241 
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 
244 
If gravitational waves cause fluctuations in space time, than could all gravitational waves, large or small all would...

Jan1614 03:32 PM
ilikescience94

0 
244 
I was looking at the Wikipedia entries on Time Travel and the Grandfather paradox and noticed a paragraph on the...

Mar614 04:58 AM
johne1618

1 
244 
Hiya,
I am a grad student who has had a couple semesters of GR. I am currently perusing a book about Two Spinors in...

Feb1014 02:34 PM
dozappp

0 
246 