All Questions
Tagged with general-relativity time-dilation
58
questions with no upvoted or accepted answers
11
votes
0
answers
274
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Radiative equilibrium in orbit of a black hole
According to Life under a black sun, Miller's planet from Interstellar, with a time dilation factor of 60,000, should be heated to around 890C by blue-shifted cosmic background radiation.
How they ...
- 2,196
4
votes
1
answer
378
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Can a gravitational wave produce oscillating time dilation?
I was reading about gravitational waves and about laser based detectors. I also read this. As mentioned in the answer, when ever there is a deformation in spacetime, doesn't it also create a minute ...
- 272
3
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158
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Shapiro time delay for signal with velocity $v<c$? (updated)
Consider appendix A in this paper.
Here a situation is considered where a particle is moving along the red $z$-direction, while experiencing the symmetric gravitational potential of two massive ...
- 1,517
2
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133
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What would an observer inside of a collapsing shell observe?
What does and observer inside of a collapsing shell observe? Lets say we have a shell of matter collapsing to a black hole. What would observers near the center see? How would the rest of the universe ...
- 2,908
2
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73
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Frame of Reference chosen in Hafele-Keating experiment
I do not understand why we chose the frame of reference which is at rest with respect to Earth's center. I get that it does not experience the acceleration due to centripetal force of Earth's rotation ...
2
votes
1
answer
81
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Time dilation from the Equivalence Principle
I've read as many questions as I can before asking this question, but most questions involve examples of specific situations with specific spacetime metrics, which is helpful but not really what I'm ...
- 860
2
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39
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If someone in freefall towards earth used a telescope to look at someone in a spaceship accelerating at 10m/s/s, would they see their clock run fast?
Basically I'm quite confused about relativity haha. I've been told that the only two things that affect whether you'll observe someone else's clock ticking at a different rate than yours are
Your ...
2
votes
1
answer
99
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Lorrentz Transformation in Rain Metric Derivation
In order to derive the rain coordinate system for a falling body in a black hole, we use Lorrentz Transformation of time instead of time dilation formula to go from shell time to rain time (Exploring ...
- 1,161
2
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419
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Clock synchronization and definition of simultaneity along a curve or contour in general relativity
What I understand so far
Fix a point $A$ with coordinates $x^\alpha$ with respect to a frame $K$ with metric tensor $g_{\alpha\beta}$. Then take an arbitrary point $B$ infinitesimally close to it with ...
- 21
2
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answers
52
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How is force transmitted through a gravitational well via matter in GR?
Lets say we have a hollow spherical shell of mass with a small hole in it. Inside the shell, the gravitation time dilation makes time pass $t_d$ times as fast as time passes infinitely far away. There ...
- 780
2
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1
answer
66
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Symmetry in gravitationnal time dilation: some details
This question is related to this topic
However I am not satisfied with the answer. Let's try to be clear and use precise notations. Let's consider a non-charged and non-rotative sphere of mass M, an ...
- 127
1
vote
1
answer
88
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Relativistic Time-Keeping and Sharing
Suppose there are 2 ships which keep time using atomic clocks. The atomic clocks are the same build so it is know that the two keeps keep proper time at the same rate. Suppose that the two ships ...
- 14.4k
1
vote
1
answer
82
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Is there gravitational time dilation as we look further out into space (and therefore further back in time)?
There is a formula for gravitational time dilation which relates the slowing of time to a changing force of gravity.
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- 371
1
vote
0
answers
48
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Correct form of gravitational time dilation comparison between frames?
So, assuming the following is correct, for proper time $\tau$ and reference time $t$ with $\phi$ potential per unit mass
$$dt \approx \frac{d\tau}{\sqrt{1+\frac{2\phi}{c^2}}}$$
If you're trying to ...
- 11
1
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176
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How fast does time pass in a void?
How much faster does time pass in a comsic void compared to earth?
I know that the passage of time on earth is affected by the gravities of Earth, the Sun and the Galaxy, as well as by nearby galaxies....
- 2,908