All Questions
33
questions
8
votes
5
answers
1k
views
Do you always experience the gravitational influence of other mass as you see them in your frame?
You see a galaxy far away. That galaxy is attracting you with a certain amount of gravity. I'm wondering if the gravity influence of the galaxy on you, as measured by you, always ends up being what ...
- 171
-3
votes
1
answer
99
views
Would time dilation increase the distance between objects? [closed]
Two objects are moving towards a gravity well. They are at $x$ distance from each other and moving at a fixed speed. The gravity well is massive enough for the objects to experience significant time ...
- 141
0
votes
1
answer
80
views
How to sync up different timelines and real events in general relativity? [closed]
Imagine this scenario:
Mike lives on a massive planet, so massive he experiences time going slowly.
Le petit prince lives on a small planet ( not much time dilation )
After millions of years (making ...
- 111
-2
votes
2
answers
75
views
Is it true that time dilation in a universe with no gravity could not be calculated without knowing how much mass is present in the universe?
Looking for a quick clarification on something. I am a layman and I have been trying to find out how much time dilation would exist if there was no gravity anywhere, and ignoring what seem to be ...
0
votes
1
answer
112
views
Understanding consequences of spacetime relativity
If I understood right, time flows slower where there is more gravitational force (or to be more precise, as it was pointed out to me, where gravitational potential is lower), compared to where there ...
- 141
0
votes
0
answers
32
views
How do we know that gravity emission is not time dilated like luminosity? $g'=γg$
It seems like gravity emission would be expected to decrease with time dilation. I've thought this from my first reading of Special and General Relativity, and I never heard a satisfying explanation ...
- 275
-2
votes
1
answer
78
views
How does gravity affect "Timeless" particles like photons?
Just finished a class a while ago and in it was discussed the nature of gravity being due to mass' effect on time etc. etc.
My question is: how then does gravity effect something like a photon, which ...
1
vote
0
answers
37
views
Does the clock tick faster when falling? [duplicate]
I just read this answer that explains that the time dilation due to the gravity and the time dilation due to velocity are the same thing.
Does that mean that, if I fall from the top of a skyscraper on ...
- 143
0
votes
3
answers
409
views
Why would spacetime curvature cause gravity given that the value of gravitational time dilation is so small?
In this question, mpv provides the clearest explanation of the operation of gravity in his answer:
The apple moving first only in the time direction (i.e. at rest in space) starts accelerating in ...
- 300
13
votes
9
answers
3k
views
How does gravitational time dilation affect matter?
Einstein successfully melded together space and time into one entity called spacetime in his General relativity theory and gave us further insight into how matter affects spacetime.
John Wheeler said “...
- 719
1
vote
1
answer
960
views
How does gravity affect time dilation? [duplicate]
I understand that the faster you move through space the slower you move through time, but how does gravity play a role in that?
4
votes
4
answers
4k
views
How can time be curved?
Time isn't a physical object, but according to Einstein's theory of gravity, mass bends spacetime towards things with mass and makes them fall. How does a physical object affect something intangible?
1
vote
2
answers
170
views
Bell's paradox but with acceleration caused by a uniform gravitational field rather than rocket engines
Bell's paradox has in the past been the topic of quite heated discussions. It is posed in the context of a silk thread connecting two identical rockets whose engines are ignited at the same instant. ...
- 2,403
0
votes
2
answers
79
views
Gravitational Time Dilation and Equivalence Principle
My question relates to page 118 of these notes, which is reproduced below for your convenience. Specifically, I have difficulty understanding the line "This shows that time slows in a region of ...
- 201
0
votes
1
answer
68
views
What determines intensity + range of a gravity field?
Related questions..
How does the Sun's gravity extend out millions of miles to influence the far reaches of our solar system?
Reference: movie - "Interstellar", 2014 Nolan) / How does a ship ...
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