All Questions
Tagged with gravity electromagnetism
207
questions
7
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Can gravity radiate?
In electromagnetism, when a charge accelerates, it emits radiation. We know this because we can write the retarded potentials, apply $\vec E=- \nabla V-\frac{\partial \vec{A}}{\partial t}$ and $\vec B=...
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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 ...
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Gravitational Constant with ENM Units?
To give some context, there's a conspiracy 'theory' that I saw called Electric Universe that says that gravity is not a fundamental force and instead is a "incoherent dielectric acceleration"...
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Why does the wavelength of gravitational waves increase with larger energy?
Gravitational and electromagnetic waves are quite similar, as both are fundamental force waves that travel at the speed of light and have no limit to their range, but when it comes to electromagnetism,...
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Does gravity affects electromagnetic waves? Or electromagnetism affects gravity?
I'm confused about the relationship of electromagnetism and gravity, or are they even related?
It has been said the electromagnetic field produces a gravitational field, and so, there is no gravity if ...
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Has anyone noticed that $G \times K\approx \frac{3}{5}$? [closed]
I have noticed that $$G \times K\approx \frac{3}{5}$$ Where $G$ is the universal gravitational constant and $K$ is Coulomb's constant.
Moreover, the approximation is so good that, taking into account ...
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"Space is a medium of gravity but not of electromagnetism"...how does this work?
It is undeniable that spacetime is medium for gravitational waves propagation as first confirmed by LIGO experiment having elasticity and compressability.
However, for electromagnetism space has the ...
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Why can this magnet hold more weight vertically?
I was browsing Amazon for magnetic hooks for my fridge and saw this diagram which surprised me because it is the opposite of what I would expect. Wouldn't the "Vertical" magnet be the ...
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Why doesn't the lack of electromagnetic repulsion between dark matter particles result in the formation of black holes? [duplicate]
From what I've researched dark matter isn't subject to electromagnetic forces, which I'm assuming implies that there is a lack of electromagnetic repulsion between dark matter particles.
If there's ...
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Maxwell's equations in curved spacetime not invariant under metric perturbation gauge transformations
Gauge transformation in general relativity
This post states that
$$h_{\mu\nu} \rightarrow h_{\mu\nu} + \partial_\mu \xi_\nu + \partial_\nu \xi_\mu \tag{1}$$
Is a gauge transformation for a spin-2 ...
- 631
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The Relation Between Maxwell's Equations and the Equations of Gravitoelectromagnetism
Under certain conditions, it is possible to approximate the effects of the theory of relativity through equations very similar to those of Maxwell, but for gravity. In these equations, our "...
12
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Weight of magnet depends on its N-S orientation?
I weighed a Neodymium disc magnet and found that it weighs about $1$ mg more when the north pole is upwards than when the south pole is upwards.
Can this be explained by "conventional" ...
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Do the other 3 fundamental forces also warp space-time?
I got this idea from Einstein's insight using the falling elevator. He says, that Gravity really cannot be distinguished from any other force accelerating the elevator.
A bunch of questions on here (...
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2
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Does a linearly accelerated observer inside an inertial spherical charged shell detect an electric field?
The electric field inside a charged spherical shell moving inertially is, per Gauss's law, zero.
If the spherical shell is accelerated, the field inside is not zero anymore, but it gains a non-null ...
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Magnet force vs gravity
I'm currently at work and the question of differences over the strength of gravity vs the strength of magnetism. Hypothetically if the sun was a giant neodymium magnet what affect would that have on ...
