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2answers
83 views

A place of space-time where the only fundamental interaction will be the gravitational forces: does make sense?

We know that there are four (fundamental forces) fundamental interactions of nature, this Wikipedia. I'm curious about if we can speculate that there exists a place of the space-time in which, after ...
0
votes
1answer
236 views

Can particles become entangled by every of the three basic forces, or even by gravity?

A pair of particles can become entangled after having had an e.m interaction. Almost every example of entanglement is that of electrons whose spins become entangled having had an e.m. interaction, or ...
4
votes
3answers
157 views

Current constraints on Dark Matter self-interaction from galactic profiles

The self-interaction of dark matter may be small but it cannot be negligible if it is able to dissipate energy to relax into galactic clumps (necessary to explain galaxy rotation curves). According ...
1
vote
0answers
87 views

Which of the 4 forces can we practically or theoretically influence?

Obviously we have the ability to create an EM field quite easily as seen in an MRI machine. Do we currently have the ability to control any of the other fundamental forces... One or other of the ...
17
votes
3answers
4k views

Why must the speed of light be the universal speed limit for all the fundamental forces of nature? [duplicate]

Einstein discovered from studying the electrodynamics of moving bodies, that the speed of light $c_{em}$ is the same for observers, which move relative to each other with a constant velocity. But why ...
2
votes
2answers
2k views

What could happen if each of the four fundamental forces became stronger or weaker? [closed]

Theoretically, what could happen if: Strong interaction Weak interaction Gravitation Electromagnetism Became stronger or weaker? What would be the observable effects for each, separately?
3
votes
1answer
466 views

Could the 4 Forces Split Off or “Decay” into Other Forces in the Distant Future? [duplicate]

From my basic understanding of popular-level physics articles and books and such, the 4 forces (Electromagnetism, Gravity, Strong and Weak Force) used to be 1 force in the early universe, then split ...
3
votes
2answers
213 views

Playground of Forces

Why is it that the gravitational force acts on large sized objects while the strong and weak nuclear forces act at subatomic levels only? What is that stops each other to enter each others domain?
4
votes
2answers
318 views

interaction at a distance: how it works

In classical physics, I know the forces due to gravity and electrostatics. I know a lot of work has been done, but don't know the status. Is there a generally accepted theory of how the force is ...