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Feb2313 08:40 AM
ZapperZ

1 
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

0 
41,318 
Suppose you were to board a ship on Earth departing for a star system 1,000 light years away. You accelerate at 1g...

Apr1814 03:06 PM
Camel_City

2 
311 
Light can be affected by gravity and as I understand it light can be a source of gravitational effects on other...

Apr1814 01:19 PM
PAllen

18 
1,178 
Lately, I have been giving a lot of thought to whether or not photons would have mass or not. I know most on here an...

Apr1814 09:42 AM
Andrew Mason

14 
925 
In Steven Weinberg "gravitation and cosmology principles and applications of the general theory of relativity"...

Apr1814 09:27 AM
nenyan

0 
318 
Hi, this might be a silly question, but it does confuse me when I read about general relativity. From what I know...

Apr1714 12:10 PM
jtbell

2 
417 
Im reading about Coulombs law in my textbook.
It states that:
"The forces between to charged particles are...

Apr1714 10:47 AM
UltrafastPED

1 
315 
This has bothered me for a long time. I understand that time varies with velocity relative to the observer. But what...

Apr1614 06:33 AM
Nugatory

9 
472 
Suppose a black hole travels at something like v = 0.999999999c relative to some observer. Does the black hole's event...

Apr1614 04:46 AM
martinbn

6 
491 
In another thread Wannabenewton mentioned:
and gave this reference:
Until WBN mentioned it, I had never given...

Apr1614 01:44 AM
WannabeNewton

199 
9,841 
Hello everyone. Thought of this question while at work. I've read the universe appeared out of nothing and expanded...

Apr1614 12:08 AM
Mordred

9 
407 
Hi,
I know there are already other posts about extremal aging, but all of them are actually closed
and none of...

Apr1514 04:57 PM
RiccardoVen

6 
407 
Hello,
Im interested in surface gravity of Kerr black hole it means, I need to find killing vector for Kerr which...

Apr1514 09:33 AM
Vrbic

2 
383 
Hello, all.
I've been attempting to understand relativity the past week. I've also been reading about quantum...

Apr1514 02:06 AM
bhobba

5 
471 
So, there's a paper here that I'm a bit confused about. On pages 3 and 4, it talks about energy density magnitude and...

Apr1414 08:22 PM
MattRob

0 
424 
If I am not mistaken, the change of the minkowski metric to:
n_{\mu\nu} \rightarrow g_{\mu\nu}(x)
will violate the...

Apr1414 08:10 PM
Geometry_dude

4 
336 
"... Supposing that the bodies act upon the surrounding space causing curving of the same, it appears to my simple...

Apr1414 04:13 PM
DaleSpam

10 
610 
I have a question on the tension between special relativity and quantum mechanics, so please correct the category if...

Apr1414 04:03 PM
DaleSpam

17 
872 
I'm starting with the Einstein box. It's the one that's floating in space and has photons moving from one side to the...

Apr1414 08:48 AM
UltrafastPED

17 
663 
Hi
Bear with my possible ignorant. I am puzzled over this dilemma. If General Relativity states that gravity is the...

Apr1414 07:27 AM
Mordred

5 
411 
My question is the following: Have there ever been any experimental tests of the Einstein equation (a.k.a. Einstein...

Apr1314 05:33 PM
Geometry_dude

2 
374 
Suppose that you have a region of space with no fields and the only matter is in the form of a cloud of pointmasses....

Apr1314 11:54 AM
WannabeNewton

2 
399 
...
I gained most of my elementary understanding of Special Relativity (SR) from books by Isaac Asimov. I made the...

Apr1314 09:14 AM
Wes Tausend

29 
1,288 
This came up while I was trying to research the interaction of an electromagnetic plane wave with a dielectric slab,...

Apr1214 04:16 PM
universal_101

2 
313 
Someone on another forum shared with me that a 6L6 vacuum tube exhibits a blue dot when in operation that is supposed...

Apr1214 01:44 PM
nsaspook

2 
404 
Hello everyone,
I have recently read a puzzling statement on my Electromagnetism (Chapter on Special Relativity)...

Apr1214 11:45 AM
Zag

15 
547 
Neat "rubber sheet" analogy of the curvature of space time on YouTube. Skip to 5:57 for orbits around the Earth moon...

Apr1114 02:46 PM
A.T.

1 
382 
good day ,
I am not a professional , but I read that in according to laws of physics it is not possible to go...

Apr1014 11:20 PM
Wes Tausend

5 
410 
I started attending to GR lectures, and there we referred to an intelingent beetle living on a 2D flat space and...

Apr1014 10:54 AM
ChrisVer

0 
253 
Given that distance between two points can vary depending on your frame of reference wouldn't that mean that the...

Apr1014 04:59 AM
ghwellsjr

5 
391 
I have been trying to work out the solutions to a homogenous line universe using special relativity, and have found...

Apr914 10:17 PM
122520253025

2 
401 
Hey guys
based on the Einstein train thought experiment we can say that different inertial frames disagree on...

Apr914 04:49 PM
analyst5

20 
1,122 
In a video on the youtube channel "Veritasium", it is explained that an electric field and a magnetic field is...

Apr914 01:37 PM
jartsa

14 
652 
Suppose we do a constant Jacobian transformation (which is not Lorentz) of a SR (inertial)
frame, by using four...

Apr914 12:01 PM
hwl

2 
513 
Kevin Brown, in his excellent book "Reflections on Relativity" p. 409, "immediately" integrates 2 geodesic equations:...

Apr914 07:35 AM
Bill_K

1 
276 
I've been told on many occasions that light will always be measured at the same speed regardless of measuring...

Apr814 11:01 PM
ghwellsjr

15 
1,051 
Dear,
If i start from the Einstein Hilbert ACtion and apply the usual Noether rules (as we use them on flat...

Apr814 09:42 PM
pervect

2 
328 
Hey guys, as we know the concept of the rest frame is one of the most famous concepts in any kind of relativity,...

Apr814 07:00 PM
analyst5

16 
760 
Please excuse this question from a lay person but if I don't ask I will never know.
I know that the speed of light...

Apr814 05:06 PM
somebodyelse

25 
797 
Hi!
I am trying to understand how magnetic fields actually are electric fields viewed in a different frame of...

Apr814 12:32 PM
TrickyDicky

20 
762 
Let's say we have a mass with an object orbitting with constant speed in a circular orbit and a distant observer Bob....

Apr814 09:14 AM
PeterDonis

47 
1,724 