All Questions
6
questions
3
votes
1
answer
117
views
Transformation of derivatives of coordinates
I am quite new to this topic. Please bear with me.
Suppose we are given a transformation of both time and space coordinate's derivatives as
$$
\partial_t\to D_t=\partial_t-f(t,x)\partial_t\\
\nabla\to ...
- 1,335
2
votes
2
answers
207
views
Yet Another Twin Paradox Question - Is orbit an inertial reference frame?
This question The "Satellite Paradox": Twin paradox in orbiting satellites asks something similar, but none of the answers quite get at the meat of what I'm trying to understand. On the ...
- 215
2
votes
2
answers
192
views
Effect of velocity on gravitational force
If I am aboard a spacecraft and have with me two identical metal spheres having rest mass $= m$, what happens to the gravitational force between these two spheres as the space craft velocity ...
1
vote
2
answers
100
views
Does a gravitational field get transformed when switching from one inertial frame to another?
We know that electric and magnetic fields get transformed when switching from one inertial frame to another as per the rules governed by special relativity. What about gravitational fields?
- 908
2
votes
1
answer
173
views
How much of general relativity does the equivalence principle actually imply, why is it different?
From EP we have that gravity is not a force but a pseudo force, i.e
an inertial force due to a gravitational field an accelerating a body
independantly of its mass, in other words, the trajectory of ...
- 91
1
vote
5
answers
264
views
Einstein's Elevator - Constant acceleration eventually reaches $c$. Can't that be used to detect gravity vs acceleration?
Objects with mass that continuously accelerate will eventually approach $c$, but cannot exceed it. So if I find myself in an elevator, unable to determine if I'm in a uniform gravitational field or ...
- 111