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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
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The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...
Dec31-07 02:06 AM
jtbell
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The metric due to the gravitational field of a spherical mass is described by the schwarzschild metric ds2 = c2 (1...
Nov30-09 03:39 AM
yuiop
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I wonder what would various exotic objects in general relativity look like, alone and with things around them, for...
Apr21-10 11:12 AM
Artlav
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To anyone smarter than myself(which should be a lot of people here): It's clear that relativity neccessitates that...
Nov20-03 09:25 AM
Ambitwistor
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It is well known that traveling at superluminal speeds violates causality, this can be shown by a space time diagram,...
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PeterDonis
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The Crother's thread obviously needs a new home, as the OP of this thread doesn't want it hijacked to discuss...
Jun28-06 12:27 AM
Crothers
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If I swing my arm, it can emit gravitational waves?? Thank you in advance!
Apr3-07 07:08 AM
Garth
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I've read somewhere that a single photon is traveling backward and forward in time and that this is supposed to be...
Jun27-09 08:15 PM
diazona
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Hello, When you read, you see that there are different opinions on the question, does a photon have mass? From...
Mar28-10 04:57 PM
DaleSpam
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Hi, I asked a theoretical question here a month or two ago and someone was able to help me. I have another: Imagine...
Jan24-11 07:53 AM
bobc2
14 1,538
Does the relative motion of a thing slow down the relative motion of a thing? Hope that makes sense or you can work...
Jan18-12 08:53 PM
jartsa
10 1,538
Hi All, Long time no post! I've asked a highly-related question to the one I'm about to ask here, but there's a...
Jan18-14 12:42 PM
phyti
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I'm reading, General Relativity, by Robert M. Wald. On page 39 he has the following notation: \displaystyle{...
Dec28-03 07:28 AM
jeff
5 1,537
Scientific alternative to the anthropic principle by Baez http://arxiv.org/pdf/hep-th/0407213 To me this is an...
Dec16-04 05:24 PM
Andrew Mason
7 1,537
Hello, My name is Edward Solomon and I am curious to know what would happen in the following scenario. Let us...
Jan21-10 07:01 PM
Edward Solomo
5 1,537
I have been reading discussions where the Rindler horizon is compared to the event horizon of a black hole. In the...
Aug25-10 07:08 AM
Austin0
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Although I retired from active physics research almost 2 decades ago, there's a question that has annoyed/intrigued me...
Feb9-13 11:18 AM
atyy
27 1,537
Edit. I think the topic is misinformative and I dont know how to change it. Hey I have to translate this into...
Dec15-11 09:50 PM
ghwellsjr
3 1,537
hi, I am trying to understand the meaning of the following equation in the simplest way possible thanks in...
Feb9-12 05:48 AM
avery
13 1,537
Light rays in the schwarzschild metric satisfy the differential equation \frac {d^2u} {d\phi^2}+u=3Mu^2 ...
Apr21-05 02:37 PM
pervect
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1st Q~ if a man in a spaceship travelling at say 0.5 c measures two beams of light outside the spaceship that are in...
Mar30-07 10:41 PM
JesseM
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Why is it impossible to find ALL of einstein's equations in one place? well I suppose its irrelevant, I'd just like to...
May19-09 10:58 PM
ilocar
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Hi, I've begun learning about General Relativity, though I've already had some exposure to differential geometry. ...
Jan9-12 09:44 PM
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Hi all, I am wondering if it is possible to derive the definition of a Christoffel symbols using the Covariant...
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GRstudent
14 1,536
The action of non-spinning particles in scalar gravity is ...
Oct27-08 10:39 PM
tim_lou
6 1,535
Here's the impossible scenario I THINK I understand, from the train/platform thought experiments and the "twin...
Aug4-09 07:01 AM
TrashmanL
10 1,535
I am reading Michio Kaku books and Brian Green Books and I am planing reading Stephen Hawking books and I have a...
Mar9-10 01:20 PM
JesseM
16 1,535
In another thread I recently learned that relativistic time dilation does not depend on acceleration, i.e. that there...
Oct4-10 08:10 AM
DaveC426913
11 1,535
Dear relativists, I have problems trying to understand the following statement in Forces from Connes' geometry I...
Mar6-09 06:01 PM
shoehorn
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To make a long story short I'm suppose to be learning how to "obtain non-zero curvature components of Schwarzschild...
Aug27-09 05:45 PM
23571113
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I'm listening to Prof. Leonard Susskind's lectures on GR on youtube.com at...
Oct9-12 02:33 PM
pervect
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What is the definition of a clock in relativity theory?
Aug5-04 01:30 PM
pmb_phy
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G'day! In the paper "Black holes and entropy" (JD Bekenstein, Phys Rev D 7 2333, 1973), in the section on Geroch's...
Jun10-07 02:40 AM
pervect
1 1,533
A spaceship becomes lighter and easier to accelerate as it burns fuel. If it doesn't literally burn fuel, but it...
Oct1-09 12:06 PM
Count Iblis
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A bus travels at a very high speed. It's time slows down. What's the mechanism by which this happens? Any help...
Sep11-11 06:52 AM
HallsofIvy
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I have read the wikipedia article on this but my mind just can't seem to comprehend the meaning of this equation. I...
Jan21-07 05:09 PM
Pathway
6 1,532
Figure 2-4 in "Spacetime Physics" by Taylor & Wheeler The figure illustrates the effects of free float on the...
Apr13-08 04:16 PM
Daverz
5 1,532
In his book 'Einstein's Universe' Nigel Calder wrote (16, BBC, 1979) - "The world's most powerful accelerator of...
Mar18-09 02:01 PM
cam875
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The question is: A rocket has a constant acceleration in a rest frame that is 0 to 0.8c in 4s. What is its proper...
Mar28-09 03:51 AM
Al68
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..the future of the cone be blocked because of information is ceased? Hello everyone. This is my first post, and I am...
Apr7-09 11:12 PM
aaryan0077
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Okay, weird question. Sorry if this is really stupid but it's been bugging at me for days now. First, let me lay...
Sep21-10 01:44 PM
Mentz114
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