All Questions
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On the equivalence principle
In its simplest version, it states that
the effects of a uniform gravitational field are indistinguishable from those of a uniform linear acceleration of the frame of reference
The thing is, you can ...
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3
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Equivalence Principle in Newtonian Physics vs GR: A Thought Experiment
I have a question regarding the equivalence principle as it applies in Newtonian Physics and General Relativity. Consider a thought experiment involving a free-falling elevator.
Inside the elevator, ...
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Is there really no way to know if you are accelerating or you are in gravitational field? [duplicate]
So any gravitational field will have a gradient, no? But an accelerating object does not experience any gradient of force. So you should be able to tell if you are in gravity or accelerating by ...
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Why don't two accelerated clocks behave like two clocks in a gravitational field?
If we immerse two clocks in a gravitational field at different altitudes (with the approximation that both heights share the same g for equivalence to be true), the falling and Schwarzschild observers ...
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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 ...
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1
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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 ...
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2
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Two clocks in free fall
A clock at the tail end of an accelerating rocket runs slower than a clock at the nose end. The situation is similar if the rocket is standing upright on earth, so the clock at the tail end is slower.
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2
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3
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Do freefalling clocks within a small region of spacetime undergo gravitational time dilation?
I have several times seen explanations of gravitational free fall (eg, of a small object toward earth with no air resistance) that begin with the following claim about the particles of the free-...
2
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2
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Does Einstein's Equivalence Principle ignore time dilation? [duplicate]
It seems Einstein's equivalence principle is neglecting time dilation. If an observer is at rest in an inertial reference frame, free of any gravitation, she will experience time flow at the "...
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Reconciling the Rindler Metric with a multiplicative time dilation in a constant gravitational field
So looking over this answer: Does gravitational time dilation happen due to height or difference in the strength of the field?
I am not sure if I am following completely. My issue relates to time ...
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Does time dilation in a constant gravitational field depend on the choice of coordinates?
I am currently taking a course in general relativity and one of the homework problems for the course asks to justify the fact that time dilates in a constant gravitational field using the equivalence ...
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If the equivalence principle is true, and gravity causes time dilation, why doesn't acceleration also cause time dilation?
I'm sure I must have something very confused but I'm just reading through SE questions and articles and this seems to be a contradiction. Until recently I had no problem as I assumed that acceleration ...
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4
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Am I understanding the equivalence principle correctly?
So Einstein stated that gravity and acceleration are the same things in a local reference frame (please correct me if I misstated that).
Here is what I think I understand and want you to verify if it ...
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3
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How is 1 g on a planet different from 1 g in a space ship when we look at aging?
This question has been asked before in the form of the 'Twin paradox' , and there are 42 pages of questions on this site alone when I search for 'twin paradox'.
For example
Does the twin paradox ...
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Is there an absurdity in GR prediction about time dilation inside a thick spherical shell?
In his book, Relativity: The Special and General Theory, Einstein claimed that the clocks in a gravitational field, as well as those located on a rotating disc, run slower solely due to the ...
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