This does not answer the question.
Coupling? what dose this mean?
Answering questions with questions.
I have answered what charged is. Coupling is a general concept.
Coupling is the amount/measure of how the dynamics of two fields effect each other.
What exactly do they represent?
The path of a particle in a Magnetic Field.
I apreciate your responses and learning a level of understanding of how magnetism works is quite interesting, however it's fundamental cause and how it came into being is the question.
We know many things about it but this we do not know.
If you would answer in the context: "This is what we currently understand" It would be more appropriate however, the condensed answer still is, fundamentally, "we do not know".
It came into being in the early universe when various symmetries were broken.
"It is the purely spatial terms of 4 dimensional electromagnetic curl" or "It is the result of a relativistic disagreement between an electric field and a stationary observer".
It's existence can be derived from two simpler assumptions in current theory, so its nature is very well understood.
Edited by Son Goku, : No reason given.
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