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Feb2313 08:40 AM
ZapperZ

1 
40,983 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
40,643 
The constancy of the speed of ligth is a result of the Maxwell's equations.
And the Lorentz transformation is an...

Nov706 02:27 AM
Ich

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Two observers, A & B, are moving apart at constant velocity V. At distance D, B sends a pulse to A which arrives T...

Jul1909 09:19 PM
diazona

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Hi
Consider a space ship at rest in space, this ship is equipped with a bomb connected to two rings. Once the rings...

Oct112 11:33 PM
zonde

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This is a diversion from the "Interesting energy problem" thread. That thread lost its direction a bit lost due to...

Jul711 03:39 PM
Qreeus

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I've read about Schwarzschild and Kerr metric, I confused about the spacelike singularity(occur in nonrotating...

May2810 05:55 AM
stevebd1

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Probably this has an easy answer but I can't see it just now, according to the principle of relativity we shouldn't be...

Jan2111 10:52 AM
TrickyDicky

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I have a question, after reading about black holes. What is the "gravity equation"? Let me explain. If the earth...

Dec2504 01:38 AM
pervect

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I’m an electrical engineer. When explaining gravity in GR terms to my peers, and I get to the part about there being...

Sep2007 07:35 AM
Mentz114

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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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Is Gravity a Force of Attraction?
We are familiar with electromagnetic attraction and we understand how and why it...

Dec1804 07:11 PM
Nereid

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This would make perfect sense if light was instataneous; i.e., if c equals (that's right, equals, not approaching)...

Mar1005 10:14 PM
dextercioby

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i just started studying special theory of relativity and am confused a lot. its first consequence,that is moving...

Sep412 02:25 PM
Doc Al

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So if I'm a fast object moving in a sphere, in my frame of reference the sphere begins to contract along the direction...

Jan2510 10:21 AM
Demystifier

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According to Einstein, if you could ride a beam of light and look at your surroundings it would seem as if everything...

Aug3010 03:10 PM
Naty1

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Good Afternoon,
After watching a TV program "Into the Universe" "Time Travel " I have some doubts left.
I know...

Feb611 11:26 PM
NoDoubt

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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

9 
2,162 
Muons are formed from cosmic bombardment and they fall towards the Earth.
So here's the problem: Muon's have...

Jun1712 04:14 PM
DrGreg

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Hey! I'm trying to understand time dilation in terms of minkowski diagrams.
Below I've added a diagram showing the...

Jan1912 02:44 PM
bobc2

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2,161 
According to Hawking Radiation, a black hole if left alone will eventually evaporate. As the black hole loses mass the...

Mar912 10:04 AM
Naty1

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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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I have been mulling over the idea of the oftquoted 'prohibition' on particles travelling 'faster than light'. While...

Jul912 10:37 AM
Demystifier

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I'm working my way through D'Inverno's Understanding GR and have reached Chapter 7 with no real problems. I'm stuck...

Jan1610 06:01 AM
TerryW

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since the first moment I've started studying the theory of relativity i thought that the minkowski metric represents a...

Feb1110 03:07 PM
A.T.

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Hey i was just wondering where Einstein got the idea for his postulates of the speed of light being the same in all...

Jun2510 07:23 AM
jtbell

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Why is that general relativity does not define what space is. It just says when there is a stressenergy tensor in...

Oct1410 03:25 PM
Garth

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A light wave has mass 0, so except his movement in one direction with lightspeed C it can't be moved in an other...

Oct2911 07:58 AM
digi99

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As you may already know, given a timelike congruence describing some extended body with worldtube ##\mu## embedded...

T 04:09 PM
PeterDonis

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General relativity says that the gravitational "field" is just the warping of space by mass. I like to think of the...

Oct1406 10:30 AM
Daverz

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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

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Is there any way in relativity to mathematically compute what the rate difference would be between two identical...

Jun912 01:48 PM
arindamsinha

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I understand the concept of a spacetime (future) singularity in a BH
I understand what is a ring singularity in...

Feb909 03:54 AM
stevebd1

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I am trying to proove that the following relation:
A_{\nu} \partial_{\mu} \partial^{\nu} A^{\mu} = A_{\nu}...

Apr311 06:03 AM
LAHLH

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How fast does gravity travel, and how do we know this? I know it can't travel faster than light, but it seems it's...

Jun2611 03:08 PM
danR

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Imagine there is a train moving at .9c with a person on the train and an observer on a platform watching the train go...

Oct812 04:14 AM
A.T.

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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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I have a quick question about Space & Time. From what I understand Space and Time are interwoven into "SpaceTime" Is...

Nov2610 11:38 AM
jimharvard

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Why is according to relativity the flowing of time an illusion (as Einstein put it)?

Apr1706 11:58 PM
pervect

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One of the most frequently asked questions in the cosmology subforum is about how the radius of the observable...

May2411 02:10 PM
George Jones

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186000 miles long with zero flex or give. You have an observer at both ends. Observer A has a machine strong enough...

Jul1711 11:10 PM
DaveC426913

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Why is it that the relativity of simultaneity isn't used to explain wave/particle duality?
RoS requires that...

Jan2911 03:31 AM
Phrak

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