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Feb2313 08:40 AM
ZapperZ

1 
42,293 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
41,924 
Increase in weight if an object is illuminated
Are there experiments which show that the weight of a body, with...

Jan312 10:40 PM
climatos

3 
1,077 
Hey,
I'm just curious, MOND (Modified Newtonian Dynamics) seems to have a character of field renormalization...

Jan312 03:32 PM
rorix_bw

6 
1,050 
Is it possible for a particle to exist according to one reference frame and simultaneously not exist according to...

Jan312 03:01 PM
pervect

7 
1,557 
does there exist an angular speed limit, just like we have 'c' in relativistic mechanics?
If Yes, How?
If No, Why?

Jan312 02:48 PM
phydev

3 
1,242 
how are scientists able to distinguish between photons?
Photons are smallest quanta of EM (electromagnetic)...

Jan312 03:20 AM
climatos

2 
776 
When 2 objects A,B are moving wrt to each other (lets say @0.86c)then from frame A if local time is 10 years then time...

Jan312 02:18 AM
Snip3r

5 
1,621 
Hi all,
I'm reading Sean Carroll's Space Time and Geometry and haven't figure out how equation 4.64 is derived,...

Jan212 03:46 PM
Bill_K

2 
1,793 
Hey everyone, I am reading a Schaum's Outline on Tensor Calculus and came to something I can't seem to understand. ...

Jan212 09:00 AM
atyy

19 
4,071 
I got the general form of a Lorentz transformation in a GR book,
{\textbf{x'}} = {\textbf{x}} +...

Jan212 08:14 AM
Chestermiller

4 
2,212 
Quick question about the EFE's. When writing the einstein tensor G_{\mu\nu}=R_{\mu\nu}\frac{1}{2}Rg_{\mu\nu}, and...

Jan112 06:24 PM
unchained1978

2 
943 
I know hyberbola in spacetime diagram is that curvelike line below the light cone much like the bottom of a bath tub....

Jan112 05:09 PM
PeterDonis

6 
1,146 
I don't really know much about GR, but I was just wondering about this theoretical question. I am asking this,...

Jan112 05:06 PM
DaleSpam

9 
1,496 
I am curious about time dilation of atomic clock positions on and in the Earth. If you had a long tube going through...

Jan112 02:55 PM
pervect

21 
1,877 
Micro black holes should in principle be observable by emitting Hawking radiation. However, as this takes place...

Jan112 08:02 AM
timmdeeg

4 
1,153 
It is a thought experiment and based on time dilation.
It goes like..
consider a cab moving with a speed close to...

Jan112 05:08 AM
Nakshatra

27 
2,243 
I'm sure this question gets brought up a lot, but I can't figure out why this is true. Everywhere I look, people...

Jan112 01:42 AM
atyy

9 
1,469 
Is there any software or program which can plot spacetime diagrams which includes worldlines, hyperbolas, etc. given...

Dec3111 09:22 PM
bobc2

1 
1,402 
http://i209.photobucket.com/albums/bb185/BobC_03/Block_Universe_1.jpg...

Dec3111 09:02 PM
George Jones

85 
9,146 
I can't manage to understand the quasischizofrenic way we should believe that our universe started at a certain time...

Dec3111 06:22 PM
DaleSpam

94 
7,513 
Something confused me. It is said that nonrelativistic Bohmian Mechanics uses multipleparticle wave functions which...

Dec3111 06:00 PM
stglyde

0 
676 
Hello all,
Would like to get some feedback on some questions I had about special/general relativity and a thought...

Dec3111 04:41 PM
pervect

13 
1,306 
If in the twin paradox instead of the twin travelling to the distant star lets say he stays and the earth along with...

Dec3111 08:20 AM
Snip3r

42 
2,844 
I imagine I have two clocks that are synchronised and are sitting a long way from a large massive body. I hold on to...

Dec3111 05:28 AM
timmdeeg

8 
2,060 
Galileo's pendulum could have shown that local time is relative
Making experiments with pendulums Galileo...

Dec3111 02:19 AM
D H

24 
2,424 
If you happen to have D'Inverno's Introducing Einstein's Relativity, this is on page 187. He has reduced the metric to...

Dec3011 10:59 PM
PhyPsy

2 
1,044 
I found out that Proxima Centauri is 4.2 light years away from earth. If someone was on a voyage to this star via...

Dec3011 11:22 AM
Naty1

5 
1,106 
Hey all,
After reading some fairly elementary texts on special relativity, I understand length contraction and time...

Dec2911 10:02 PM
DaleSpam

18 
3,167 
I understand that space is curved inwards by the mass of the planet and I understand how curved space could redirect...

Dec2911 07:46 PM
Padraic

19 
2,255 
I have a couple questions about relative motion, since I've been reading everywhere that motion is relative...
...

Dec2911 04:09 PM
DrewD

11 
1,614 
I am not sure whether GR corresponds to Mach Principle?
I heard that Mach Principle stimulated Einstein to inch...

Dec2911 03:59 PM
yicong2011

0 
903 
I'm reading a physics book and in the section on relativity they are using the Einstein summation convention, with...

Dec2911 01:36 PM
spacelike

3 
880 
What will happen in the following scenario?
I am standing on the earth.
Right next to me, a small rocket...

Dec2911 01:07 PM
ghwellsjr

3 
965 
Is this correct?
There are two clocks on Earth that are synchronized. One clock goes out on a spaceship at .8c.
...

Dec2911 05:11 AM
ghwellsjr

34 
2,993 
I have a fairly decent understanding of black holes, but have always had one curiosity that I haven't found a distinct...

Dec2811 06:32 PM
gatz

7 
1,244 
I have been reading about 3spheres and found it was impossible for me to visualize it. I tried visualizing a 4d...

Dec2811 02:00 PM
genius01

6 
2,312 
I do believe that somewhere I have read that an electromagnetic field does produce a gravitational field.
So,...

Dec2811 01:35 PM
Monster99d

6 
1,516 
This question is in regard to special relativity.
From my rudimentary understanding, concerning the twin paradox,...

Dec2811 11:55 AM
ghwellsjr

76 
6,196 
Consider this scenario involving twins.
The twins, A and B, are some unspecified distance apart and are placed...

Dec2811 07:11 AM
DaleSpam

8 
1,403 
Hi everyone,
Consider two frames: the rest frame that has a stationary point charge and the moving frame which has...

Dec2811 06:08 AM
Qreeus

6 
1,243 
Let's say I had built a machine that is able to slow down time (Travel to the future) by one eighth. If the object...

Dec2811 06:06 AM
Vanadium 50

1 
886 