A Do state variables in general relativity have analogies in electromagnetism?

cuallito
Messages
94
Reaction score
1
TL;DR Summary
Like for Electromagnetism
Hi, does general relativity have state variables, analogous to current (I), charge (Q), voltage (V), and flux (Φ) in electromagnetism? Thanks.
 
Physics news on Phys.org
cuallito said:
does general relativity have state variables, analogous to current (I), charge (Q), voltage (V), and flux (Φ) in electromagnetism?

None of the variables you give for electromagnetism appear in Maxwell's Equations, which are the EM analogue to the Einstein Field Equation of GR, so that would seem to mean the answer is no.
 
Thread 'Can this experiment break Lorentz symmetry?'

Thread 'Can this experiment break Lorentz symmetry?'

1. The Big Idea: According to Einstein’s relativity, all motion is relative. You can’t tell if you’re moving at a constant velocity without looking outside. But what if there is a universal “rest frame” (like the old idea of the “ether”)? This experiment tries to find out by looking for tiny, directional differences in how objects move inside a sealed box. 2. How It Works: The Two-Stage Process Imagine a perfectly isolated spacecraft (our lab) moving through space at some unknown speed V...
View full post »

Thread '1-Way Speed of Light'

Does the speed of light change in a gravitational field depending on whether the direction of travel is parallel to the field, or perpendicular to the field? And is it the same in both directions at each orientation? This question could be answered experimentally to some degree of accuracy. Experiment design: Place two identical clocks A and B on the circumference of a wheel at opposite ends of the diameter of length L. The wheel is positioned upright, i.e., perpendicular to the ground...
View full post »

Thread 'How can a black hole absorb matter?'

According to the General Theory of Relativity, time does not pass on a black hole, which means that processes they don't work either. As the object becomes heavier, the speed of matter falling on it for an observer on Earth will first increase, and then slow down, due to the effect of time dilation. And then it will stop altogether. As a result, we will not get a black hole, since the critical mass will not be reached. Although the object will continue to attract matter, it will not be a...
View full post »

Similar threads

A Looking for linear frame dragging formula
Replies
3
Views
149
A How do we interpret measurements of Mercury's position?
Replies
11
Views
980
A How to show spin ##= \pm 2/\omega## for a circ-polarized gravity wave
Replies
0
Views
1K
B First Experimental Confirmation of GR
Replies
8
Views
2K
I Does General Relativity explain inertia?
Replies
38
Views
4K
B Why do people care about vacuum solutions in GR?
Replies
9
Views
1K
A Covariant form of Maxwell's (inhomogeneous) equations (in GR)
Replies
9
Views
622
I Reconciling Lorentz Four-Force Density w/ Spacelike Four-Current (##c = 1##)
Replies
10
Views
2K
B Special Cases of Stress-Energy Tensor in GR
Replies
10
Views
2K
B Charged Particle on Earth's Surface: Will It Emit Radiation?
Replies
13
Views
2K

Hot Threads

Recent Insights

Back
Top