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fxdung
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They say wave function is different to quantum field. Then what is the difference between EM wave and EM field?(By the way :Is that EM wave the wave function of photons?).It seem to me EM wave is the wave of EM field?
That's correct.fxdung said:It seem to me EM wave is the wave of EM field?
fxdung said:Then what is the wave function of photons?
That question is a complete muddle of terminology from different theories: non-relativistic QM, classical EM, QFT, QED.fxdung said:They say wave function is different to quantum field. Then what is the difference between EM wave and EM field?(By the way :Is that EM wave the wave function of photons?).It seem to me EM wave is the wave of EM field?
As @PeroK very successfully said you are mixing up different theories of physics. My answer would be within the theory of classical electromagnetism:fxdung said:Then what is the difference between EM wave and EM field?
@vanhees71 will tell you that there is no wave function of the photon. I will tell you that it is the Fourier transform of the 1-photon probability amplitude in the momentum space.fxdung said:Then what is the wave function of photons?
The most general 1-photon state can be written in the formvanhees71 said:Define "1-photon probability amplitude in the momentum space"!
Well, it's a function and it's wavy.vanhees71 said:but that's not a "wave function"
An EM wave, or electromagnetic wave, is a type of energy that travels through space in the form of oscillating electric and magnetic fields. These waves are created by the movement of charged particles and can travel through a vacuum.
An EM field, or electromagnetic field, is a physical field that is created by the presence of electrically charged particles. It is a fundamental part of electromagnetism and is responsible for the interactions between charged particles.
The main difference between EM waves and EM fields is that EM waves are a form of energy that can travel through space, while EM fields are a physical field that is present in space. EM waves are a result of the oscillation of EM fields, but they are not the same thing.
EM waves and EM fields are closely related, as EM waves are a result of the oscillation of EM fields. EM waves are created when charged particles, such as electrons, are accelerated and create changes in the EM field. These changes then propagate through space as EM waves.
No, EM waves cannot exist without an EM field. As mentioned before, EM waves are a result of the oscillation of EM fields. Without the presence of an EM field, there would be no energy to create EM waves. Additionally, EM waves can also affect and alter the EM field they are passing through.