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Feb2313 08:40 AM
ZapperZ

1 
41,596 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
41,247 
I have read a number of threads on acceleration and special relativity, but can't find what I'm looking for. I would...

Feb2308 02:58 PM
DaleSpam

10 
2,089 
I have just read the "Read Before Posting" sticky thread and am wondering. Relativity is a difficult theory to...

Feb2208 12:54 AM
chroot

46 
3,907 
Is there an invariance relation for angular momentum similar to E^2 = p^2 + m^2 ?
How about quantum spin ?

Feb2108 03:15 PM
pam

1 
1,227 
Been reading about aberration and two explanations that diverge  classical and relativistic. at speeds much slower...

Feb2108 03:05 PM
yuiop

5 
2,984 
there are a few things i don't get when it comes to light moving at c from all frames of reference... i mean it makes...

Feb2108 10:37 AM
Janus

9 
2,122 
You have charged dust (pressure = 0, charge density/mass density = given constant). I suppose the total...

Feb2108 08:10 AM
Ich

1 
2,123 
Is there any consensus among experimental and/or theoretical physicists about Tom Van Flandern's ideas about gravity...

Feb2108 06:46 AM
gonegahgah

53 
9,543 
In other threads the topic of how the proper time of a clock under acceleration has come up a number of times so I...

Feb2108 01:49 AM
1effect

18 
4,317 
Hi,
as a highschool teacher I am stuck with the following student's question on time dilatation (SR) which could be...

Feb2008 05:14 AM
yuiop

19 
3,746 
Just a thought; if indeed electrons transit around the nucleus, shouldn't we see relativistic doppler shifting as...

Feb1908 02:02 PM
ZapperZ

14 
3,129 
tattman posted this in a thread and i was curious to know an explanation so i decided to post it in a new thread
...

Feb1908 01:46 PM
uprootedferre

2 
1,117 
I have been trying to show that the Einstein ring radius R_e = 2^1/2
to no avail. can someone who knows this show me,...

Feb1908 06:39 AM
George Jones

1 
4,544 
Given we have a spherically symmetric gravitational field around a spherically symmetric body of mass M.
How can I...

Feb1808 10:35 AM
TheMan112

4 
3,587 
First of all, velocity is a relative phenomenon. When we say velocity of an object is s m/s, it is relative to some...

Feb1708 07:11 PM
nanobug

6 
1,844 
How do I rewrite Einsteins famous field equation
R_{ab}  \frac{1}{2} g_{ab} R = \frac{8 \pi G}{c^4} T_{ab}
...

Feb1708 05:39 PM
TheMan112

11 
2,808 
If T_{ab} = \rho u_a u_b is the stress tensor for dust. How can I show that T^{ab}_{;b} = 0 mean that dustparticles...

Feb1708 05:28 PM
TheMan112

0 
989 
I am reading Taylor and Wheeler's Spacetime Physics. I am enjoying it a lot and find it extremely readable but I have...

Feb1708 05:01 PM
Ed Quanta

0 
1,264 
Hey folks,
Does anyone know how to get the line element on a torus? The ds^2 term.
I want to find the metric...

Feb1708 04:38 PM
robousy

2 
2,600 
Hello everybody, this is my first post here.
I need help with a task in General Relativity.

Given we...

Feb1708 10:19 AM
CompuChip

10 
3,037 
The idea is that you have a clock at the origin of some frame O. In order to synchronize this clock with 2 other...

Feb1708 06:28 AM
Doc Al

7 
2,270 
Good day to you all, I am total amateur so people with high physics degree dont need to waste their time since this...

Feb1608 04:02 PM
Tachyonie

2 
1,406 
I was thinking about how one would teach special relativity using a spacetimegeometric approach. I think you would...

Feb1608 09:12 AM
Fredrik

16 
4,311 
Well, it's an interesting thought, but one that I can't quite believe, or maybe more I can't understand how, something...

Feb1508 08:44 PM
RetardedBastard

65 
7,574 
Rereading "On the Electrodynamics of Moving Bodies" by A. Einstein from 1905 (English translation I found on the...

Feb1508 06:23 PM
W.RonG

6 
1,757 
As we know, Bondi derives the Lorentz transformations (LT) via the radar detection of the spacetime coordinates of a...

Feb1508 03:31 PM
bernhard.rothenstein

7 
1,975 
i've never been good at putting my thoughts into words...so i was hoping someone could pickup on my theory, maybe even...

Feb1508 11:43 AM
HallsofIvy

1 
1,463 
When searching for KK stuff in forums, I see that when g(5) is applied to L(5 R), this effectively splits the equation...

Feb1508 10:51 AM
MikeL#

13 
3,540 
Hi im new to understanding the theory of relativity so please excuse me. I can make sense of most of it. The one thing...

Feb1408 07:55 PM
CaptainQuasar

8 
1,644 
Imagine a solid chain from the Earth to the moon's surface (which I believe is 1.5 light seconds away).
Now Imagine...

Feb1408 04:00 PM
russ_watters

4 
1,315 
Does anyone know of any good tutorials for grtensor (for maple) other than the documentation that comes with the...

Feb1408 12:14 PM
Pacopag

0 
4,447 
How do you argue that the equation for time dilation derived from studying a light clock can be used in general. For...

Feb1408 11:32 AM
country boy

3 
2,720 
Could someone pleases either:
a. Justify the notion that the Lorentz interval between two events is independent of...

Feb1408 06:58 AM
DrGreg

15 
3,526 
Hello all.
I asked this question as a subquestion in another thread where it was perhaps inappropriate. It is very...

Feb1308 11:12 PM
JesseM

9 
1,673 
This thread is another extending from the `Schwarzschild Metric` and `Climbing out of a Black Hole`. I hope the...

Feb1308 10:34 PM
yogi

6 
2,027 
I ahve always wondered why only the curvature term R_{\mu,\nu} been considered in GR. From differential Geoetry, how...

Feb1308 04:47 PM
geoffc

2 
2,116 
The time dilation equation:
\Delta t' = \Delta t/\sqrt{1  v^2/c^2}
Now lets consider a tachyon with v = 2c
...

Feb1308 04:20 PM
DaleSpam

71 
27,461 
Hi everyone;
I'm new to both PF and GR, so please bear with me if I'm not being very clear, or using standard syntax...

Feb1308 10:05 AM
haushofer

3 
2,531 
Forgive me if this has been posted before, but looking through a page of search entries I found many topics that were...

Feb1208 04:44 PM
yuiop

19 
2,775 
If we impose that under no force or gravitational field Lorentz transform must hold, my question is if the validity of...

Feb1208 01:04 PM
yuiop

2 
1,811 
Let’s put an observer in a 3D frame of reference at x=0, y=0, z=0 to observe one of Einstein’s thoughtexperiments. ...

Feb1208 06:24 AM
JesseM

3 
1,503 