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Feb2313 08:40 AM
ZapperZ

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

Dec3107 02:06 AM
jtbell

0 
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I am interested in a reason as to why time dilation is not possible. I have done some sloppy google research and have...

Sep2210 10:20 PM
ritzmax72

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would some be able to give me an example that shows some evidence of length contraction?
i have looked at the muons...

Oct2006 10:32 AM
Meir Achuz

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You are an observer fixed in absolute space watching clocks pass between two points, A and B, separated by 1km. The...

Feb2406 08:50 PM
clj4

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I was looking into the geodesic equations for the Schwarzschild metric and I noticed a discrepancy between two...

Nov1608 10:16 PM
derbes

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Hello everyone.
So naturally, as I'm sure everyone else here does, I believe in the education of the general public....

Mar509 08:19 PM
daytripper

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The title about says it. Is a body, (frame) free falling in a gravitational field a valid inertial frame as defined...

Aug2009 02:07 PM
DrGreg

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Suppose we have two ships A and B in uniform motion according to each other(A claims B to in motion and B claims A to...

Jun2011 11:45 AM
DaleSpam

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Hello, I was wondering how collisions would when both objects are travelling at c.
Imagine 2 cars driving towards...

Nov1311 04:59 PM
Drakkith

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Does the equation for Lorentz contraction stay exactly the same when
quantifying the 'mass increase factor' at...

Oct1105 02:06 PM
Trilairian

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Hello Forum,
I have been reading a book, the Fabric of the Cosmos, by Brian Greene. It talks about Newton...

Jan2312 07:35 PM
nitsuj

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"any ray of light moves in an 'stationary' system of coordinates with the
determined velocity c, whether the ray be...

Jul3005 06:48 PM
paco1955

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A common concept used in the explanation of the twin paradox is that upon acceleration, one twin sees the other twin's...

Sep1807 05:42 PM
Xori

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How many of you over here are familiar with the twin paradox?
I am personally quite fascinated with this phenomenon...

Mar2907 04:32 AM
daniel_i_l

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General relativity describes gravity as simply the curvature of spacetime. I believe that I read that the effects of...

Aug1609 03:05 PM
JesseM

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The expansion of spacetime stretches and red shifts the wavelength of light. Is the amplitude of the wave stretched as...

Mar2811 11:10 AM
bcrowell

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If you travel at a sufficiently fast speed, then according to relativity, you will age at a slower rate compared to...

Sep2812 08:24 AM
altergnostic

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I'm learning about relativity and, by extension, the classic MichelsonMorley setup. I cannot see why a "fringe...

Nov509 03:14 PM
JustinLevy

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I thought I would post this question here rather than in the Classical Physics formum because I expect the GR experts...

May1810 09:21 AM
stevenb

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Hi My name is Pete and this is my first post. I'm a few months away from finishing a degree in mathematics.
I'm...

Sep407 04:43 PM
Petroz

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So as I learn general relativity I am finding that it does not appear to address gravity in any way. The entire...

Aug1310 12:13 PM
JesseM

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In "Does the inertia of a body depend upon its energy content?," http://fourmilab.ch/etexts/einstein/E_mc2/www/ ,...

Jul2212 08:41 PM
Matterwave

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

Jan212 08:14 AM
Chestermiller

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Does " What you don't see with your eyes, don't invent with your mouth" does work in special relativity?:rofl:

Oct2310 05:13 PM
yuiop

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The formula which accounts for the Doppler shift is derived from the invarainace of the phase of a plane wave. The...

Mar509 02:11 AM
bernhard.rothenstein

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As I understand it, Einstein's dismissal of the "luminiferous aether" was based on his discovery that there is no...

Feb2513 10:23 PM
DaleSpam

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As the title says, imagine two observers with clocks A and B in space which move at vrel relative to each other.
...

Oct1812 01:44 AM
Simon Bridge

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If speed of light is the upper limit of speed in the universe, how about force? (please refer to example for the...

Sep2309 04:22 PM
Meir Achuz

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"The EinsteinRosen bridge was discovered by Albert Einstein and his colleague Nathan Rosen, who first published the...

Feb112 10:12 AM
snoopies622

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Hi all!
I am still a GR noob and this example has been puzzling me for a while, so I need some help that's hopfully....

Nov110 09:56 PM
Passionflower

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I guess it should be an easy question and I'm just missing smth, but I already spent on it much time and didn't get...

Sep2610 04:17 AM
arkajad

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There has been a lot of noise on this forum lately about A. Mayer's socalled "Transverse Gravitational Redshift." It...

Jun1211 07:19 PM
pervect

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The paradox was discussed already in length, but I would like to add a twist. I take for granted, that the thread...

Jul2109 02:07 AM
Ich

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The fact that the relativity of simultaneity causes events to not happen at the same time, dependent on reference...

Apr610 05:57 PM
jaketodd

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I asked this in one of my previous topics, but I just cannot find where I asked it, so here I am asking it again.
...

Dec1410 11:37 PM
atyy

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I really find difficult understanding what spacetime diagram does relativity use while defining its notion of space...

Nov1313 12:44 AM
rushikesh

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Einstein's theory of relativity?
In Length contraction and Time dialation, the distance between the two frames is...

Oct1606 10:36 PM
bernhard.rothenstein

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1. How would a general relativist explain why an object falls towards the earth?
2. Is it correct to say that it is...

Aug2607 06:30 PM
pervect

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I was just wondering since I discussed this with some people before, but exactly how likely is it that wormholes in...

Aug707 07:24 PM
Cusp

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In MisnerThorneWheeler Gravitation, Chapter 4, Page 92, Box 4.1, at section 4, there is a formula for the...

Oct2609 05:24 PM
gheremond

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If Einstein's theories are correct, specifically about objects approaching the speed of light and their mass...

Nov311 07:29 PM
T1987a2T

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