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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2
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What is missing in this gravitational time dilation derivation?
I am confused about one derivation of the gravitational time dilation.
Consider a one dimensional time-independent gravitational field. Two clocks are at rest with respect to the gravitational field ...
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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 ...
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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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Effects of acceleration and gravity on proper time
Let's consider the effects of gravity and acceleration on proper time of an observer (yes, I want to know how the equivalence principle works).
First situation: a spaceship with rocket engine stays ...
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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 ...
1
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Would the fast rotating legs of a human age slower? For how much?
Let's imagine that there is some human that rotates rapidly around his head. That means that the legs have a very large velocity, but the head has the velocity nearly equal to zero. Let's just ignore ...
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Straight line motion with uniform velocity in spacetime according to General Relativity
“The analog of a straight line in space is for space-time a motion at uniform velocity in a constant direction.
The curve of shortest distance in space corresponds in space- time not to the path of ...
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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. ...
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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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Time dilation due to acceleration - four simple situations to try to clarify
I see some relatively comprehensive answers here but then I listen to this Don Lincoln presentation on the twin paradox which seems to be saying that the resolution to the paradox is more ...
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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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Is the twin paradox purely a general relativistic effect? [duplicate]
Please excuse my ignorance here, but for most of my life I thought that the twin paradox was predicted by special relativity (ie. time dilation). I also know that the twin paradox has been explained ...
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Gravitational Time Dilation vs Acceleration Time Dilation
I might be a little dense to this subject, but I would like to ask a question relating to this one
( Is gravitational time dilation different from other forms of time dilation? )
but asking if this ...
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The equivalence principle and experiments concerning it?
Imagine that we are in a rocket accelerating with some magnitude $a_1 = dx^2/d^2t$, also imagine that we have a stationary rocket ship in close proximity to ours, stationary relative to our reference ...
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