All Questions
Tagged with spacetime reference-frames
197
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Is there an eloquent way of qualitatively explaining why the time coordinate of an event is shifted proportionally to its spatial coordinates?
We know that time must shift alongside space because $\frac{dx}{dt} = \frac{dx'}{dt'}$ when $\frac{dx}{dt} = c$. This just means that the speed of light is invariant in all reference frames (light ...
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We know there is no aether, so what is being dragged in frame dragging?
I have read this question:
In stellar frame dragging what is the 'frame'?
There are several questions on this site about frame dragging, all of them take the frame that is being dragged as an ...
- 29k
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Why time is attached with space and how apple fall according to Einstein? [duplicate]
As per Einstein space is flexible it means it can be curved with mass but I am not able to visualize the relationship between space and time (space-time continuum).
According to Newton Apple falls ...
-2
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5
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From a traveler's point of view, what prevents him from reaching the speed faster than light?
I have read the answer to this question from Eric. That answer is still from the point of view of a standing observer that sees the traveler spending infinite amount of energy. My question is asking ...
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From a traveler's point of view, what prevents him from reaching speed faster than light? [duplicate]
From a traveler's point of view, as he is accelerating with $1g$, in under one year he would reach the speed of light. Note that from his point of view, everything looks normal so he could keep ...
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Defining Simultaneity
I've been learning about relativity, and I'm just starting to wrap my head around what it means for events to be simultaneous in one reference frame, but not simultaneous in another.
Taking as the ...
- 3,075
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Asynchronous clocks in motion special relativity
I was watching this derivation of 'asynchronous' nature of clocks from which I got slightly confused.
Consider two reference frames moving relative to each other call them 'Red' and 'Blue' Frame. ...
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Special Relativity - Events "Coincide" is NOT a relative concept, Why?
Consider 1-D space. Let S and S' be two inertial reference frames. Let A and B be two events.
Co-ordinates of A and B under S are A = (xA,tA) and B = (xB,tB).
When we say events coincide - it simply ...
- 472
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3
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Why are observers/reference frames able to see themselves moving through time but not through space?
All observers are stationary in their own reference frames.
That is, their space coordinates are constant at all times (in their frame).
However, they can see themselves moving through time.
What ...
- 1,421
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Version of the Relativistic Train Paradox [duplicate]
I am having trouble resolving a version of the well known relativistic train paradox. I would prefer a qualitative explanation although any help is appreciated.
Imagine a train and a tunnel which, ...
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Spacetime dilation Moon vs Earth [closed]
As I understand it, time will pass slightly faster on the surface of the moon compared to the earth
This is due to the difference in velocity and gravitational fields of the two planets.
How could I ...
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How to define the proper time of a photon?
I'm writing a paper about the motion of photons near a Schwarzschild black hole. At some point there's a derivative of the Hamiltonian of the system with respect to time $\tau$. I need to explain what ...
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Observers at rest and simultaneity
Suppose we have two observers A and B and they are at rest. Observer A observes two objects falling from height H (A has same distance between the two objects). Does observer B will measure different ...
- 1,648
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Reference systems in Special and General Relativity
I am enthralled by the notion of placing observers along with standard identical clocks in a line spaced from one another according to rods of standard length when place next to one another at the ...
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Hypothetical effect of Solar System/Orion Spur traveling near speed of light
I was hoping that some genius could explain what we would observe in the universe around us in the following hypothetical scenario in which the earth itself were traveling at or near the speed of ...
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