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Feb2313 08:40 AM
ZapperZ

1 
37,348 
The section of the Usenet Physics FAQ titled "Experimental Basis of Special Relativity" has been cited here many...

Dec3107 02:06 AM
jtbell

0 
37,116 
As I have read, a clock in a spaceship approaching the speed of light will appear to slow down in time from the point...

Jun1811 01:50 AM
tinytim

6 
1,045 
A friend of mine had the following funny question:
Imagine I have a metric ansatz with two unknown functions. The...

Jun1711 09:08 PM
yicong2011

6 
1,636 
Hi everyone,
General relativity gives us the definition of the distance between two "events"
d=\int...

Jun1711 05:51 PM
jfy4

11 
1,582 
I've been comparing various books, including these:
Mermin, It's About Time
Takeuchi, An Illustrated Guide to...

Jun1711 04:55 PM
bcrowell

3 
843 
This might be a silly question to people who are have more practice in this subject, but how does the Schwarzschild...

Jun1711 04:02 PM
DrGreg

44 
3,916 
Magnetism is said to arise due to relativity. When an extended charged object move, length contraction occurs which...

Jun1711 02:04 PM
Blackforest

10 
1,527 
hi, i just wanted to know if i am right, that the electric field of a charged nonrotating black hole at distance r...

Jun1711 01:54 PM
Antiphon

16 
1,611 
Hi, I've been breaking my head on the matrix form of the lorentz transformation between one set of coordinates in one...

Jun1711 01:43 PM
Bill_K

2 
1,118 
I'm not a physicist, I'm only taking my first subject on physics in Eng. here in Buenos aires, so I don't know much...

Jun1711 12:04 PM
atyy

20 
3,359 
This was accidentally posted in the general forum so I moved it over to a more appropriate section of the forum...
...

Jun1611 04:45 PM
Ahsankmc

20 
3,742 
Let there be two spheres in free space. Also there are two humans on each of them.
Now the spheres move apart and...

Jun1611 02:55 PM
bcrowell

5 
806 
in my book i think that on any planet if we can stay for 1 year then on earth how much time are gone

Jun1611 10:36 AM
bcrowell

6 
919 
lets say that there is a triplet at the age of exactly 60 years old.one of them A is in space far away from any...

Jun1611 07:24 AM
sicarius

4 
907 
Feynman makes an example (156 in his lectures) about failure of simultaneity at a distance, using the Lorentz's...

Jun1611 02:07 AM
nitai108

2 
1,119 
Can anybody help me with the original calculations of hawking radiation. I am working out the details of Hawking's...

Jun1611 01:47 AM
mritunjay

3 
1,154 
Hi,
I believe you can use the "energymomentum tensor" to express the conservation of both energy and momentum for...

Jun1511 07:23 PM
pervect

10 
11,865 
If our universe is indeed expanding, would this have an effect on spacetime? For example as space and time are...

Jun1511 02:01 PM
rede96

16 
1,596 
In the essay „Über die Ablenkung des Lichtes im Schwere*feld der Sonne“ (...

Jun1511 12:24 PM
bcrowell

4 
1,118 
If observed time approaches 0 at the speed of light, does that mean the distance one travles at the speed of light is...

Jun1511 07:21 AM
harrylin

13 
1,598 
My question is: Is the inertial reference frame dependent on mass?
In rereading materials on the topic of special...

Jun1511 01:05 AM
dx

29 
2,630 
You can rewrite Maxwell's equations using d'Alembertian operator on quaternions.
Can something similar be done for...

Jun1411 10:47 PM
sweetser

12 
2,038 
I have sent approximately the following to a relativity prof at my university. It's summer, so I don't know if he'll...

Jun1411 10:41 PM
danR

4 
1,495 
Here's an idea I came up with recently, that I wanted to share:
Physics is unitary and CPT symmetric, and therefore...

Jun1411 08:45 PM
bcrowell

6 
1,119 
What is Expanding Horizon of a black hole?
Recently, I want to read something general on Expanding Horizon...

Jun1411 08:05 PM
yicong2011

6 
1,113 
I am interested in black hole scattering phenomena. Basically we have an incoming black hole which has a large enough...

Jun1411 05:51 PM
keithdow

0 
526 
ok, so i understandthat if i travel near the speed of light for a while and come back on earth than i would be younger...

Jun1411 04:10 PM
Samo84

2 
653 
If one day gravitons are discovered, would their action be complementary to the gravitational attraction due to curved...

Jun1411 01:19 PM
atyy

5 
732 
hello,
Please attached snapshot of an answer to an Ex. I was stunned at the formula for the derivative of the solid...

Jun1411 12:49 PM
zn52

6 
817 
is gravitational field made with any particles

Jun1411 12:18 PM
Polyrhythmic

2 
534 
I'm looking for a good reference work on timedependent Lagrangians. For example, the Lagrangian and resultant...

Jun1411 11:53 AM
Bill_K

1 
551 
I am simply looking for the formula to work out the time dilation on cylinders with uniform density. Also, any links...

Jun1411 08:58 AM
bcrowell

2 
647 
First off, I'm curious about the accuracy of this paper:
...

Jun1411 05:28 AM
HarryRool

2 
3,117 
After searching, I found only one posttitle on the Penrose and/or Terrell effect/rotation.
It is odd that...

Jun1411 01:18 AM
PAllen

17 
2,975 
Hello,
In Godel's paper: an example of a new type of cosmological solutions of einstein's field equations of...

Jun1311 04:40 PM
pervect

5 
2,035 
I am trying to understand this.Would I be correct in saying that the reason that the maximum speed possible is the...

Jun1311 01:48 PM
danR

14 
2,413 
From another thread this question came up:
What about tidal forces? Although they could be incredibly small...

Jun1311 08:36 AM
atyy

37 
2,773 
The metric tensor is expressed in 10 independent elements. From this is obtained the Einstein equation once given 7 to...

Jun1311 07:57 AM
Mentz114

3 
636 
In the Schwarzschild spacetime setting we have a vacuum solution of the Einstein field equations, that is an idealized...

Jun1311 07:13 AM
TrickyDicky

5 
996 
As we know GR cannot explain the flat rotation curves fo galaxies without introducing unseen dark matter and, of...

Jun1311 03:09 AM
sourena

0 
726 
I've read a lot about special relativity, and what i don't understand is that speed of lights is the highest speed...

Jun1211 09:22 PM
Integral

20 
1,140 