Gravity's effect on electromagnetic field

[alv799]

Gravity bends light because all charged particles have mass and all electric field starts and ends on some charge particle. Is that a viable explanation for this phenomenon?

 

[Dale]

all electric field starts and ends on some charge particle

Not all electric field lines start or end. That is one of the surprising results of the vacuum solutions, such as plane waves.

 

[alv799]

Can electric field exist if there are no charged particles?

 

[Dale]

Can electric field exist if there are no charged particles?

Yes, that is what a vacuum solution is. It is an electromagnetic field that exists in the absence of any charges or currents.

 

[Dylanden]

Hello

I do not understand.
How can we have an electromagnetic field without any charge or current.

Dylan

 

[MarekKuzmicki]

How can we have an electromagnetic field without any charge or current.

Well, lowest energy state is not zero (it's positive value). So we have some fields in that state - QM says its electromagnetic fields.
And on the other hand, Einstein said that there is no space without light. Isn't light electromagnetic wave?

 

[Nugatory]

How can we have an electromagnetic field without any charge or current.

That's what light is: electrical and magnetic fields propagating through a vacuum. To see how this can be, you'll have to look at some of the solutions of Maxwell's equations which describe the behavior of electromagnetic fields in the most general case.

 

[Nugatory]

Well, lowest energy state is not zero (it's positive value). So we have some fields in that state - QM says its electromagnetic fields.

The non-zero ground state energy that appears in quantum mechanics doesn't work that way, and it does not imply the existence of a non-zero electromagnetic field. Fortunately, none of this has anything to do with OP's question - classical electrodynamics and Maxwell's equations are sufficient to explain electromagnetic fields in a vacuum.

And on the other hand, Einstein said that there is no space without light. Isn't light electromagnetic wave?

Light is indeed a propagating electromagnetic wave, but do you have a reference to support the claim about Einstein?

 

[FactChecker]

Gravity bends light because all charged particles have mass and all electric field starts and ends on some charge particle. Is that a viable explanation for this phenomenon?

I think it's better to say that light goes in the straight lines in space-time as it is distorted by a massive object. The distortion of space-time is a consequence of general relativity.(see https://en.wikipedia.org/wiki/Gravi...tion_in_terms_of_space.E2.80.93time_curvature )

 

[Dale]

Hello

I do not understand.
How can we have an electromagnetic field without any charge or current.

Dylan

See the section on vacuum solutions
https://en.m.wikipedia.org/wiki/Max...s.2C_electromagnetic_waves_and_speed_of_light

 

[Dale]

Several very low quality posts were distracting from the thread and have been removed