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Feb2313 08:40 AM
ZapperZ

1 
37,346 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
37,114 
. They understand the classical Schwarzchild radius argument for black hole formation. They have bare rudiments of...

Feb2908 12:36 PM
marcus

14 
3,364 
I was working a problem in a Modern Physics book:
Find the momentum (in MeV/c) of an electron whose speed is 0.600c....

Feb2808 07:39 PM
JesseM

3 
7,950 
I am in college and have no formal training in physics, but i really enjoy the field. I was reading about redshift and...

Feb2708 03:39 PM
James23

20 
2,471 
Would the pressure and the gravitational selfenergy of a body contribute to both its gravitational mass and its...

Feb2708 03:34 PM
Xeinstein

0 
738 
I would like to preface this idea by stating that I am a total noob and in no way have any right to be here haha.
I...

Feb2708 03:15 PM
JesseM

7 
1,465 
In the space of Riemannian metrics Riem(M), over a compact 3manifold without boundary M, we have a pointwise (which...

Feb2708 02:19 PM
olgranpappy

1 
1,474 
Selleri proposes the following transformation equations
x=g(x'vt')
t=t'/g
g=gamma.
Einstein's clock...

Feb2708 12:05 PM
DrGreg

10 
2,410 
I read somewhere that relative speed of light always remains constant. That is there is no difference between relative...

Feb2708 10:05 AM
robphy

12 
1,392 
Hi there
I have a question that has possibly been covered before, however, I cannot find the answer that I seek in...

Feb2608 08:02 PM
Joanna Dark

50 
5,435 
Just out of curiousity, what's wrong with the theory that the aether is attached to the earth? It's no more fantastic...

Feb2608 04:46 PM
1effect

12 
1,626 
If the Ricciscalar R is constant for a given spatial hypersurface, then the curvature of that region should be...

Feb2608 03:58 PM
Mentz114

1 
1,562 
Please tell me if "conventionality of dimultaneity" and "Einstein clock synchronization" are one and the same thing?...

Feb2608 12:15 PM
DrGreg

4 
1,528 
I'm embarrassed to ask, but I think this will save me some time...
I'm trying to use the condition...

Feb2608 12:02 PM
DrGreg

4 
1,444 
My current understanding of the components of the symmetric stressenergy tensor used in the Einstein Field Equations...

Feb2508 12:02 PM
shalayka

0 
1,134 
Imagine we have two rockets, each with a long cylinder with it spin axis alligned with the long axis of the rocket. On...

Feb2508 06:01 AM
allebone

27 
4,230 
Hi, I brought this up in physics class a while ago but didn't get a very satisfactory response...
A train moving at...

Feb2508 05:53 AM
tinytim

4 
2,462 
So I'm introducing myself to formulas and such. I just am going over time dialation and the Lorentz factor. ...

Feb2508 12:35 AM
1effect

5 
1,715 
Hello, I am in the process of reading Black Holes, Wormholes & Time Machines and am somewhat confused, even though it...

Feb2408 11:23 AM
_Mayday_

5 
2,159 
If two black holes with equal mass and angular momentum, but the latter in opposite directions were to collide, they...

Feb2408 07:55 AM
xantox

3 
1,695 
Theory of Relativity says nothing can exceed the speed of light. My question is:
Can any information be made to...

Feb2308 07:38 PM
yuiop

5 
2,937 
I'm just wondering, what mathematics would be required to learn GR? If I'm not mistaken, SR only requires algebra, but...

Feb2308 04:58 PM
darkSun

2 
1,044 
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 
2,012 
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 
3,682 
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 
1,205 
Been reading about aberration and two explanations that diverge  classical and relativistic. at speeds much slower...

Feb2108 03:05 PM
yuiop

5 
2,823 
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 
2,019 
You have charged dust (pressure = 0, charge density/mass density = given constant). I suppose the total...

Feb2108 08:10 AM
Ich

1 
1,972 
Is there any consensus among experimental and/or theoretical physicists about Tom Van Flandern's ideas about gravity...

Feb2108 06:46 AM
gonegahgah

53 
9,068 
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 
3,816 
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 
3,547 
Just a thought; if indeed electrons transit around the nucleus, shouldn't we see relativistic doppler shifting as...

Feb1908 02:02 PM
ZapperZ

14 
2,867 
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 
1,087 
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 
4,328 
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 
3,409 
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 
1,684 
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 
2,570 
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 
964 
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 
1,227 
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 
2,466 
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 
2,938 