All Questions
14
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Dual of Newtonian gravitational field
In the static state, the laws of Newtonian gravity and Coulomb force have exactly same formulas,
$$F = K \frac{A_1A_2}{r^2}.$$
In the electrical case, moving materials produce a field, say a dual ...
- 1,409
0
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0
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66
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What is the lengthscale where electric force and gravity are comparable?
Basically the title. I came across this question while going through old exams. I thought that electromagnetism is stronger than gravity by 40 orders of magnitude more or less, at all scales, so this ...
- 716
2
votes
3
answers
347
views
Can we construct a logically self-consistent relativistic theory of gravity just by tweaking EM?
This question considers a modification of classical E&M where we simply reverse the relative sign in Maxwell's equations and change the "$q$" in the Lorentz force law to an "$m$&...
- 48.4k
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66
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Is the theory of electromagnetism very incomplete in physical interpretation? [duplicate]
Just like in Newtonian gravity, do we simply accept charge being naturally attracted to the opposite charge with a very similar Newtonian style force? (Coulomb)
Shouldn't there be a meaningful theory ...
3
votes
1
answer
129
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Numerical solution to the relative gravitational time dilation of induced dipolar gravitational fields
In gravitoelectromagnetism, an approximation to general relativity in the weak field limit, Einstein's equations simplify into a form very similar to Maxwell's equations. In this field, traditional ...
- 100
3
votes
2
answers
229
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Gravity breaks Newton's third law?
Consider a thought experiment where there is a point mass M present in empty universe. Then another point mass m materializes (This is ONLY a thought experiment) at a distance of 1 light year from M. ...
4
votes
1
answer
388
views
Is there an Abraham-Lorentz force for Gravity?
The Abraham-Lorentz force in Electromagnetism is the recoil a charge experiences as it accelerates due to own emission of radiation.
The Newtonian theory of gravity is identical to that of ...
- 596
1
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0
answers
82
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If there were positive and negative masses similar to positive and negative charges, would there be some kind of gravitational magnetic force?
Coulomb's law is very similar to Newon's law of gravitation. But as we go deeper into electromagnetic phenomena we see that it is very complex compared to newtonian gravitation. For example if the ...
- 529
3
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0
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576
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Can a Set of "Maxwell's Equations" for Newtonian Gravitation be Derived from Newton's Force + Special Relativity?
When I learned about electromagnetism in my first year of undergraduate school, Maxwell's equations were derived roughly in the following way (see also here or in [1]): Gauss's law for a static ...
- 3,369
-1
votes
1
answer
3k
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What is the difference between an electric field and gravitational field? [duplicate]
Since the electrostatic field and the Newtonian gravitational field share a similar form: proportional to
$$
\frac{1}{r^2}
$$
Is there any qualitative difference between motions under the ...
- 209
1
vote
2
answers
180
views
Does the gravitational force of one object interfere with that of another?
Assume we have two iron spheres, Sphere A and Sphere B, with identical masses floating in the vacuum of interstellar space separated by some distance from each other. The gravitational force of each ...
21
votes
2
answers
3k
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Is Newton's universal gravitational constant the inverse of permittivity of mass in vacuum?
Is it possible to consider Newton's universal gravitational constant, $G$, as inverse of vacuum permittivity of mass?
$$\epsilon_m=\frac {1}{4\pi G}$$
if so, then vacuum permeability of mass will be:...
user26425
10
votes
4
answers
14k
views
Similarity between the Coulomb force and Newton's gravitational force
Coulomb force and gravitational force has the same governing equation. So they should be same in nature. A moving electric charge creates magnetic field, so a moving mass should create some force ...
- 1,975
2
votes
5
answers
1k
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Electro-gravitation - is it real?
I came across an article claiming that if you charge two plates, one positive and one negative, and fasten them together (assuming they are insulated from each other), they will float in the air. I ...
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