All Questions
85
questions
2
votes
1
answer
76
views
How to properly combine kinetic and gravitational time dilation effect?
I developed a time dilation calculator that includes both kinetic (Lorentz Factor) and gravitational (Schwarzschild Metric Formula) factors to assess the time difference between Earth and satellites. ...
0
votes
1
answer
99
views
Time dilation with atomic clocks near accelerators or colliders
Consider an atomic clock positioned close to a high energy particle accelerator or collider.
Would the atomic clock read different values when the accelerator is operating at different "energy ...
0
votes
1
answer
137
views
What is the time dilation at escape velocity? [duplicate]
I am a newbie but as far as I understand that there are two sources of time dialations, one due to relativistic speeds and the other is due to gravitational field. If I look at these equations they do ...
- 117
-3
votes
2
answers
112
views
What made Einstein to think time also dilates, along with space, with increasing gravity?
Michelson–Morley experiment showed that speed of the light remains same regardless of speed of observer. Based on it Albert Einstein came up with the proposal of time dilation for object in speed (...
- 27
16
votes
4
answers
4k
views
How long is a second on the moon?
The Office of Science and Technology Policy, part of the government of the United States of America, issued this statement outlining the need for a Lunar Standard Time (LST) standard. They state:
For ...
- 4,030
1
vote
1
answer
96
views
Variation on Twins Paradox - Simulating Gravity
There are many questions exploring variations upon the Twin Paradox, but none I have seen seem to resolve this thought experiment.
It is often said that the 1g force we feel on earth due to the ...
- 11
3
votes
3
answers
1k
views
What is the time dilation due to acceleration?
what is the formula to calculate time dilation due to acceleration. I have tried to search in google to find out the answer but I couldn't find any equation to calculate the time dilation due to ...
- 117
1
vote
3
answers
176
views
Deriving time dilation from line element
I am having trouble deriving the time dilation. I am using $(-, +, +, +)$ sign convention.
For Minkowski metric, the line element is equal to:
$$ds^2 = -c^2dt^2 + dx^2 + dy^2 + dz^2$$
For a motionless ...
- 21
0
votes
1
answer
82
views
Twin paradox - how much energy does it take to travel to the future? [closed]
In the usual twin paradox in Minkowski space, we have twins Alice and Bob. Alice stays at home. Meanwhile, Bob visits a distant planet and returns. On return, Bob has aged less than Alice. So, in a ...
- 9
0
votes
1
answer
67
views
Time Dilation And Comparing Inertial And Non Inertial Reference Frames
Can we calculate the total observed time dilation on a spaceship and a planet by combining the planet's relativistic spin velocity and the spaceship's approach or recession velocity from the planet it ...
0
votes
0
answers
69
views
Special relativity in orbit
I am writing something for school where I need to calculate the time dilation difference between Earth and Mars. First I calculated the difference from the gravity of the planets itself + that of the ...
- 131
1
vote
2
answers
270
views
Connection between kinetic and gravitational time dilation [duplicate]
I am learning about relativity and am interested in time dilation. I now exactly understand where the formula of kinetic time dilation comes from and wondered about gravitational time dilation. I have ...
- 131
1
vote
1
answer
88
views
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
-4
votes
1
answer
98
views
Acceleration and gravitation are locally equivalent ? I find not
In a gravitational field, the above and below clocks do not run at the same rate.
The acceleration equivalent means that the simultaneity changes. During acceleration there would be a gravitational ...
- 97
0
votes
1
answer
33
views
If a car ahead of me suddenly speeds up close to the speed of light, what would I and the car observe each of us? [closed]
Suppose I and the car is beside each other and the car went a little ahead of me, then instantly speeds up close to the speed of light. Will I observe the car is going too slow or stuck at one place ...
- 21