All Questions
480
questions
-4
votes
2
answers
211
views
What is the component of gravity other than curvature? [closed]
I have always presumed that gravity was 100% curvature. But, after thinking a bit I found a contradiction of understanding.
If gravity is only curvature, then all particles should behave as light ...
- 361
2
votes
3
answers
527
views
Would our orbit really remain the same if the sun were a black hole of equal mass?
There seems to be an idea floating around that the sun could be replaced by anything of equal mass with no consequence to our orbit.
It seems to me that if the mass of the sun were confined to a ...
- 47
2
votes
2
answers
461
views
Newtonian gravity as curvature of space
Since Newtonian gravity is also indistinguishable from acceleration, it should be possible to formulate it as a curvature in space, right? For example, if a body changes velocities purely under the ...
- 6,355
1
vote
2
answers
168
views
Mental model of general relativity [duplicate]
I am trying to visualize the curvature of space-time.
In almost all of the Yt videos on the topic, it's shown as depression in the space-time fabric. But what does the dimension into which space-time ...
2
votes
6
answers
290
views
Gravitational waves manifestation of 'physical' spacetime?
When a stone is thrown in water, water waves are created. The stone imparts its kinetic energy to water. Likewise a sound speaker imparts its kinetic energy to air molecules. When an electron falls ...
- 717
4
votes
1
answer
277
views
Why does Kip Thorne claim spacetime warping itself contains energy?
Kip Thorne, in this public lecture, says
that a black hole is kept together by the energy of the warping of space.
Quote around 8:00-8:30 :
"in this case, the energy [which keeps a black hole ...
- 53
0
votes
2
answers
81
views
Gravitational attraction correlation to time [closed]
Could the fact that gravity is only attractive, and not repulsive, have anything to do with the fact that time only moves forward?
EDIT:
I am asking specifically about gravity, and not other forces (...
- 633
10
votes
7
answers
2k
views
What causes time warping in the space-time?
I was reading through some blogs/articles and watching youtube videos that explained to non-physicists such as myself - how time warping or a gradient in time flow around any object can create gravity....
- 217
0
votes
0
answers
63
views
If there are no gravity under the general theory of relativity, how can we be attracted to massive objects (from the side)?
Watching this video, it is explained that there are no force of gravity under the general theory of relativity, but a force made by objects moving through spacetime.
The example made in this video to ...
- 131
5
votes
1
answer
506
views
Does a local spacetime symmetry lead to gravity?
In the case of charge a global $U(1)$ symmetry leads to the conservation of charge, however upgrading the global symmetry to a local symmetry leads to the electromagnetic potential field $A^\mu$ such ...
- 775
5
votes
2
answers
2k
views
Is it the mass that bends spacetime, or is it the gravity?
I had understood that mass bends spacetime and that curvature generates gravity, but I have recently read that what bends spacetime is gravity.
Which comes first? Does the mass generate gravity, and ...
- 173
0
votes
6
answers
871
views
Can someone really explain the curvature of Spacetime?
I can understand the curvature of a sheet which is 2D but i can't understand the 3D curvature of space described in General Relativity. How's really the curvature of space described in GR? Could ...
user189508
1
vote
1
answer
96
views
How to explain the trajectory of object going up then come down with curvature of spacetime?
I can understand that the Moon is orbiting the Earth because it is going in a straight path within the distortion of spacetime caused by the Earth's mass, so not outside force is required. However, if ...
- 13k
13
votes
4
answers
2k
views
Why does mass bend the temporal dimension more than the spatial dimensions of spacetime?
From my (limited) understanding of general relativity, most of what we experience as gravity is a result of the distortion of the temporal dimension, and not the spatial dimensions. Therefore, most of ...
- 303
-5
votes
1
answer
668
views
How can two objects with the same mass attract each other?
According to Einstein's theory of GR, two objects with the same mass won't atract each other, Why i'm saying this? The atraction according to GR happens because the objects with less curvature of ...
user319766