Questions tagged [frame-dragging]
The frame-dragging tag has no usage guidance.
103
questions
11
votes
1
answer
475
views
Is MTW's argument in favor of Mach's principle valid?
Looking at older books, I was surprised to see that the general relativity "bible" by Misner, Thorne, and Wheeler is very strongly in favor of Mach's principle, which is treated in section ...
- 103k
10
votes
4
answers
999
views
Does the twist of spacetime by a black hole increase over time?
From the Wikipedia page about Ergospheres:
As a black hole rotates, it twists spacetime in the direction of the rotation...
Does this "twisting up spacetime" add up over time in any ...
- 163
10
votes
3
answers
4k
views
How does a rotating object cause frame dragging?
Frame dragging is a consequence of general relativity.
But I don't really understand it. Of course I can find metaphors like the "honey metaphor" where stirring a honey can move the specks even if ...
- 8,150
8
votes
1
answer
2k
views
Is this an actual photo of frame dragging?
Is this new image (below) of polarized light surrounding Sagittarius A, showing actual frame dragging being captured by the magnetic field? The image is from this article If not, how would a photo ...
- 4,783
8
votes
3
answers
1k
views
We know there is no aether, so what is being dragged in frame dragging?
I have read this question:
In stellar frame dragging what is the 'frame'?
There are several questions on this site about frame dragging, all of them take the frame that is being dragged as an ...
- 29k
8
votes
2
answers
745
views
Has frame dragging been accounted for in galactic rotation curves?
This article explicitly takes frame dragging into account in calculating expected galactic rotation curves in the absence of dark matter, and appears to obtain very close matches to observed curves. ...
- 24.8k
8
votes
1
answer
1k
views
Does frame dragging apply to linear motion?
Firstly I will admit I do not understand the real cause of rotational frame dragging and some of the math heavy explanations are too complicated for me. To me frame dragging looks like unsubstantiated ...
- 1,928
8
votes
1
answer
150
views
Can a drop of water be set in rotational motion by rotating mass around it?
We are in empty space and see a spherical drop of water. Around the drop we have placed a massive shell with uniform density. The drop is positioned at the center. Then we set the shell in rotational ...
7
votes
1
answer
395
views
Is there linear 'frame dragging'?
Very massive objects cause the so called 'frame dragging' that can increase the speed of a beam of light to a total aggregate speed faster than the speed of light in normal circumstances so my ...
- 1,815
6
votes
1
answer
417
views
Gravitational lensing redshift around a Kerr black hole
Light from a source passes by a Kerr black hole on two sides at the equator and converges at the observer. The axis of rotation of the black hole is perpendicular to the direction of light. Two rays ...
- 12.7k
5
votes
3
answers
781
views
How can a black hole rotate if time dilation stops time at the event horizon?
How does a black hole rotate if time is dilated to infinity (e.g. stopped) at the event horizon? Note: this is relevant to this question, but different: How can a singularity in a black hole rotate ...
- 213
5
votes
1
answer
169
views
Can rotation be distinguished from frame-dragging?
I am trapped inside the usual elevator and experiencing a comfortable gravitational field of about 1 g. Or perhaps it's an acceleration of 1 g. I cannot tell which.
However, I notice when I drop an ...
- 2,403
4
votes
2
answers
183
views
How is electromagnetic induction analogous to gravitational frame dragging?
This wiki says: https://en.wikipedia.org/wiki/Frame-dragging
Qualitatively, frame-dragging can be viewed as the gravitational
analog of electromagnetic induction.
I was wondering what exactly this ...
- 774
4
votes
2
answers
694
views
Frame dragging around a black hole
If you have one stationary non-rotating black hole, being orbited by a 2 or more black holes just outside each other's event horizons does this alter the size of the central black hole's event horizon?...
- 379
4
votes
2
answers
936
views
Does a spinning mass follow a straight trajectory in empty space? Or is it curved like a golf ball?
Suppose that we can send to identical satellites (like Voyager 1&2) on identical trajectories. But one spins to the right while the other spins to the left. Would they follow the same trajectory?...
- 141