Can Electromagnets Instantly Communicate Across Light Years?

  • Context: Undergrad 
  • Thread starter Thread starter JPC
  • Start date Start date
  • Tags Tags
    Phenomena
Click For Summary

Discussion Overview

The discussion revolves around the concept of communication between electromagnets separated by light years and whether their response to changes in magnetic fields occurs instantaneously or requires time for signals to travel. It also touches on related ideas about the nature of gravity and the speed of gravitational interactions.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • One participant questions whether two powerful electromagnets, when activated simultaneously, would react instantly or if there would be a delay for photons to travel the distance.
  • Another participant asserts that there would be a wait for photons to traverse the distance, implying that nothing is instantaneous.
  • A different participant raises the question of whether gravity is instantaneous or if gravitational interactions require gravitons to travel, and if so, whether the speed of gravitons is equal to the speed of light.
  • One participant claims that the force of gravity travels at the speed of light, suggesting a finite speed for gravitational interactions.
  • Another participant speculates about the possibility of traveling faster than light by understanding the nature of "Nothing," while also suggesting a more practical goal of achieving a fraction of the speed of light first.

Areas of Agreement / Disagreement

Participants express differing views on the instantaneous nature of electromagnetic and gravitational interactions, with no consensus reached on whether any form of communication or force can occur instantaneously across vast distances.

Contextual Notes

Participants do not clarify the definitions of terms like "instantaneous" or "Nothing," and there are unresolved assumptions regarding the nature of electromagnetism and gravity.

JPC
Messages
204
Reaction score
1
hey

if you have like 2 electromagnets a few light years away from each other

lets say if u turn them on at the same time (ok let's say they're very very powerful)

will they react to the new magnetic field instantly , or will we have to wait a few years for the photons to go from one electromagnet to the other


if answer : instantly :
how is this possible ?
 
Physics news on Phys.org
They will have to wait for the photons to traverse the distance.
 
Which brings up a next point. Nothing is instantaneous.
 
Oh- electromagnets. I thought this was going to be about applying electricity to romance! I'm disappointed.
 
but hey

is gravity instatanuous or do we have to wait for the gravitons to travel the distance ?

if not instatanous :
is the graviton speed equal to c ?
 
ranger said:
Which brings up a next point. Nothing is instantaneous.

So if we can find out what what "Nothing" is made of we could travel faster then light.
 
The force of Gravity travels at the speed of light.
 
sas3 said:
So if we can find out what what "Nothing" is made of we could travel faster then light.


I think it would be more rational to just try to get at least to a tenth of c , before we try that
 

Similar threads

  • · Replies 21 ·
Replies
21
Views
3K
  • · Replies 98 ·
4
Replies
98
Views
9K
Replies
6
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 20 ·
Replies
20
Views
3K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 26 ·
Replies
26
Views
5K
  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K