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Feb2313 08:40 AM
ZapperZ

1 
42,443 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
42,091 
Black holes irresistibly suck things in. That is a common misconception in science fiction. In fact, a spherical black...

Mar2308 03:59 PM
peter0302

2 
1,119 
I initially posted this question in the Beyond the Standard Model forum since diffeomorphism invariance is a key...

Mar2308 12:12 PM
kdv

6 
2,528 
Can anyone explain me the term 'Relativistic heat force'???
Any research papers dealing with this topic??
Thanking...

Mar2308 10:24 AM
yuiop

5 
1,301 
first,i am a nearly newbie high school student in physics, please i would like to learn physics from the internet...

Mar2308 09:40 AM
xristy

13 
1,606 
Hello
I red in web side " The photon has mass " Is that real ?
and what about
m = h / lamda * c

Mar2308 02:36 AM
Rel

2 
991 
I ( Swaminathan) started studying theory of relativity. I need some help in understanding the following:
Special...

Mar2208 07:44 PM
belliott4488

92 
11,715 
Hi
GR had presented two types of motion , the geodesic motion and the nongeodesic motion . We know that the...

Mar2208 01:55 PM
the shadow

1 
1,296 
Consider a system containing multiple massive objects, where the field is weak everywhere and velocities are...

Mar2208 12:35 PM
Xeinstein

0 
1,608 
An extremely elementary question but....
Lets say we had a spaceship sitting on earth under the influence of...

Mar2208 11:42 AM
yuiop

12 
2,959 
AAPPS Bulletin Vol. 15 No. 5, October 2005
http://www.aapps.org/archive/bulletin/vol15/155/15_5_p17p21abs.html
...

Mar2108 10:05 PM
J.F.

46 
7,623 
Do you know any attempt or sound proof of the BelinskyKhalatnikovLif****z (BKL) conjecture? What is the present...

Mar2108 09:38 AM
Lester

0 
1,429 
Hi, can someone explain or point me to some reference which explains the exact mathematical nonsense that emerges when...

Mar2108 08:36 AM
meaw

0 
913 
If temperature or heat, is particles vibrating, and nothing moves faster then light. Doesn't this create a fundamental...

Mar2108 04:57 AM
yuiop

4 
1,074 
Classically if you lift up a body, say a brick, you are doing work against the gravitational force, this work is then...

Mar1908 06:22 AM
Denton

6 
1,560 
Please be patient, as you are dealing with a relativity newbie here!
I've read Einstein's book, "Relativity: The...

Mar1808 08:36 PM
JesseM

27 
4,603 
http://scitoys.com/attention/2007/05/einsteinpointsway.html
According to the author, magnetism is an implication...

Mar1808 08:21 PM
Mentz114

1 
911 
Hello;
What does it mean physically if I have?
R_{a b} = Ag_{a b}
I think it means that my manifold is an...

Mar1808 09:17 AM
Pacopag

3 
2,981 
The null result of the MichelsonMorley experiment led Lorentz to believe that the ether can never be detected because...

Mar1808 07:24 AM
ZapperZ

26 
4,222 
The main question is really: can you consider a reference frame at rest w.r.t. a nonrotating massive object to be an...

Mar1808 06:27 AM
masudr

2 
2,063 
in another forum a person said that the gravity moves off as an object.
i seid that is no true
the dialog has been...

Mar1708 02:49 PM
RandallB

7 
1,990 
Is the value of Pi related to the curvature of spacetime?
Is it the value that it is because spacetime is more or...

Mar1708 02:40 PM
pervect

18 
5,684 
Suppose, you live on a planet in orbit around Alpha Centaury which is approximately 4 light years away from our own...

Mar1608 06:35 PM
DaleSpam

4 
1,231 
Every time I try to learn special relativity the statement is made that ds^2 = ds'^2. This time I am trying to derive...

Mar1608 04:42 PM
matheinste

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2,618 
It seems to me that all of the talk about "absolute" acceleration is a complete nonissue, in terms of relativistic...

Mar1608 03:35 PM
DaleSpam

15 
6,045 
GR is invariant under general coordinate transformations. If I understand correctly, this is basically devoid of any...

Mar1608 09:09 AM
Ken G

8 
2,356 
I am beginning a textbook on SR and I have come across the introductory example of disagreement regarding...

Mar1608 01:17 AM
JesseM

5 
4,090 
Hi friends,.
If black holes absorb light also, how can it exert any gravity outside a particular region? Or something...

Mar1408 11:13 PM
JesseM

1 
1,079 
So, we have the "relativity of simultaneity", which is meant to show us that two relatively moving observers have...

Mar1408 03:13 PM
JesseM

30 
4,207 
I am having trouble understanding how the explanation of the paradox solves the problem. What if people in two...

Mar1408 02:06 PM
JesseM

6 
2,066 
I saw in a website that Einstein found the deflection angle of a ray grazing the sun through this relation ...

Mar1408 12:28 PM
shalayka

2 
1,981 
I'm a bit stuck with trying to interpret this for acceleration in earths gravity. The question is:
D^2 Y^d =...

Mar1408 09:30 AM
ijustlost

0 
1,478 
Ok. There are some concepts here that I am having trouble reconciling.
I would first like to "stipulate" that for...

Mar1408 07:12 AM
tinytim

9 
2,121 
What are the appropriate units for the left half of the GR equation? Meters? square meters..? To put it another way,...

Mar1408 04:52 AM
Ich

6 
1,639 
The twin paradox is very confusing, and even after reading the explanation, I still get questions. The only...

Mar1308 10:39 PM
JesseM

9 
1,335 
Does a photon age?

Mar1308 08:09 PM
Doc Al

32 
2,979 
Why should time be considered as a 4th dimension?

Mar1308 06:12 PM
GearsofWar

5 
1,725 
Say you have only one particle, say an electron or proton or quark in the known universe.
Can it move? Since matter...

Mar1308 04:15 PM
russ_watters

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2,014 
The statements that "spacetime is curved by matter" and that "curved spacetime tells matter how to move" summarize GR...

Mar1208 09:16 PM
Xeinstein

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884 
We can all see what curvature of space looks like, just by throwing a ball and watching it follow the natural...

Mar1208 12:44 PM
belliott4488

4 
1,745 
Hi there, just wondering if anyone can help with transforming the Christoffel symbol of the 2nd kind using the...

Mar1208 11:35 AM
supernova1986

0 
976 