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Feb2313 08:40 AM
ZapperZ

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41,673 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

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the starship enterprise wishes to fly to a distant galaxy 85 light years away. at what speed would it have to travel...

Jan2405 01:25 AM
hype_chicky

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1,019 
I have read several books on relativity and find the subject fascinating. But there are a couple of things that I hope...

Mar109 09:34 AM
Naty1

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Why no FAQ for the Twin Paradox?
There are a few topics for which a FAQ would be very useful. I'd suggest that the...

Jun209 09:48 AM
DaleSpam

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What is E = \frac{m_{0}c^{2}}{1v^{2}/c^{2}}

Mar2112 06:54 AM
granpa

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Do photons effectivley travel instantaneously? If not then the question posed by Einstein "If I travel at the speed of...

Nov2803 10:30 AM
Pyrokenesis

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A thought occurred to me when reading the Encarta article on relativity:
Now, it occurs to me that the velocity...

May404 08:44 PM
turin

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I just wanted a quick affirmation. Can light orbit a black hole? That is, can light remain between two welldefined...

Aug404 08:17 PM
turin

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I like simple physical setups to articulate and generate good thought experiments.
Setup:
Consider a hole cut in a...

Mar1806 01:45 AM
my_wan

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At what mass does an object start to noticeably bend light?

May1406 02:50 PM
pervect

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Hey ,if we need to calculate time dilation with an accelerating frame of reference,cant we simply use the lorentz...

Jan2607 11:56 AM
Chris Hillman

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Lets imagine a place in space where there is no mass or energy to warp spacetime
how much would time pass or ...

May2809 03:31 AM
neopolitan

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Lets say we emit a photon from the ground out towards the sky , and as the photon travels away from earth it gets...

Jul810 05:45 PM
cragar

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so, a bit of confusion here  suppose i have a spaceship that can acheive 0.99999C, and i decide to go to a star that...

Aug210 04:22 PM
Doc Al

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Given a particular system, how would one construct the stressenergy tensor? I was reading Mallett's paper and the...

Dec3013 02:55 AM
WannabeNewton

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Great Paper with some general calrifications on how Time is percieved in various...

Aug2604 12:49 AM
marcus

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1,017 
This maybe a simple question, but if Earth orbits the Sun due to the Sun's mass 'curving' spacetime, wouldn't we be...

May1613 05:43 AM
surprise

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This may sound mind numbingly stupid to those who are seasoned in Physics, but how do we know that it is impossible to...

May1506 03:24 PM
SpaceTiger

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Vibrating charges emits electromagnetic waves. Does any vibrating mass is capable of producing wave (that can be...

Sep2606 05:27 PM
cesiumfrog

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Does the theory of relativity include angular motion? Say we have one body synchronously orbiting a motionless body....

Sep508 06:41 AM
DrGreg

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Hey guys, i was just wondering what would happen if a person was on a spacecraft traveling at 0.9c was standing on a...

Mar1511 06:06 AM
nsh3a94

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I want to find a good reference in GR about the application of tetrad.
Is there any good suggestions?

Apr711 10:44 PM
xienohp

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i constantly feel that newton was right in measuring the relative velocity.einstein makes use of light which has a...

Aug2211 02:32 AM
harrylin

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Is it possible that the metric tensor gmn consist of functions of complex variables?
Let say you have a system...

Jun1713 08:34 AM
WannabeNewton

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Has anyone out there downloaded and got working ( a critical point ) the SHEEP package
from:...

Feb709 01:47 PM
sjsilverman

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I read in a book that mass is invariant. Does this mean that an object's mass does not increase as it approaches the...

Dec109 02:09 PM
DaleSpam

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If time stops at the speed of light, how does light travel throught space and time? Example: The light from a star...

Feb1110 05:06 AM
Matterwave

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Hey, I'm stuck on part of the calculation for the compton wavelength. Basically, my notes go:
Energy of Electron
...

Feb1410 03:53 PM
jtbell

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Hi all.
Suppose we have two objects A and B, and suppose we tie a rope R to the objects with the rope R's two edges...

Jun1911 09:30 PM
DaveC426913

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I like to try and derive little things by myself if I think it is manageable. One such thing is the addition of...

Dec1511 11:58 PM
nhmllr

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HI guys first post :cool:
I need to show that
B^2E^2/C^2 is invariant under Lorentz transformation (E and B...

Apr3004 09:31 AM
DW

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Just seeking a bit of guidance if I may ?
If Lambda 1 is the time dilation caused by a gravitational field (ie...

Mar1309 01:39 AM
taylog1

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1,015 
According to the BiotSavart Law, the equation for the magnetic field around a charged particle moving with constant...

May509 08:51 PM
clem

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1,015 
In my cosmology lectures they say that a negative curvature gives an infinite space but I was thinking what about the...

Feb1910 07:06 AM
George Jones

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When an object moves in curved spacetime, how does its angular momentum vector transform? My hunch is that the...

Oct1010 03:12 PM
pervect

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Let a clock A be at rest in an inertial frame and let a clock B rotate around it with constant velocity and constant...

Feb2411 04:10 PM
JesseM

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Two observers A and B are in relative motion with a constant velocity.If A knows the the position of B accurately ,...

Mar2011 01:00 AM
Anamitra

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What if I shoot a bunch of electrons into a black hole, could I make the coulomb repulsion over come the gravity and...

Jul2411 02:57 PM
pervect

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I was wondering if the electrons change to Tau electrons when an object reaches close to the speed of light. From my...

Apr2013 06:48 AM
Vanadium 50

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Hey guys. I have a question regarding exercise 6.5 in MTW ("Radar Distance Indicator"). The exercise asks the...

Jan414 01:12 AM
PeterDonis

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The PauliLubanski spin 4vector for a particle in its rest frame is given by Sμ = (0, Sx, Sy, Sz). (Note this is the...

Dec2212 11:35 AM
pervect

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