Magnetic field is made of virtual photons?

[tupos]

I really can't understand sense of this discussion. Why does everybody separate electric and magnetic field?

It is the same field!

People here speak about electric field more only because of the relation E=cB that's all.

There is no difference between "electric" and "magnetic" photons they both appears as a components of four-potential.

Photons appears as a quant of field (as it is the same field there is no sense to separate it) .

But on experiment u can't measure potential. People measure only strong characteristic of the field it means E and B.

Regards.

 

[cragar]

Doesn't anything with spin have a magnetic moment , like the neutron B moment ,
so doesn't the photon have its own dipole moment.

 

[Hans de Vries]

Doesn't anything with spin have a magnetic moment , like the neutron B moment ,
so doesn't the photon have its own dipole moment.

Only "things" which spin and have charge can have a magnetic moment. The
individual quarks of the neutron do have magnetic moments.

Charge is quantized and therefor cancels out exactly in the case of a Neutron.

The magnetic moments aren't quantized and can also be parallel or anti-parallel
to each other. Therefor neutral bound states of charged particles do generally
have non-zero magnetic moments.


Regards, Hans

 

[cragar]

what about the Anti neutrino and neutrino , does this imply that the neutrino has sub particles which have charge.

 

[Hans de Vries]

what about the Anti neutrino and neutrino

They have spin (1/2) but no charge nor magnetic moment. They are
elementary particles without any known substructure.

Regards, Hans

 

[cragar]

then what is anti-about them , like the neutron and the anti-neutron their quarks are opposite in charge. so is it possible the neutrino's have sub elements.

 

[Ghuggi]

Photons are massless particles. They carry forces as it is one of the bosons.

 

[jtbell]

then what is anti-about them

When a neutrino interacts with something by exchanging a virtual W boson, you get a negative lepton out (either an electron, a muon, or a tau, depending on which type of neutrino). When an antineutrino interacts similarly, you get a positive lepton out.

Examples:

$$\nu_\mu + n \rightarrow \mu^{-} + p$$

$${\bar \nu}_\mu + p \rightarrow \mu^{+} + n$$

 

[cragar]

i see thanks jt bell