Electric fields

[Magicatt]

Im curious if electric fields interact with each other. I'm not referring to interraction between particles with electric charges. Thanks.

[swansont]

Electric fields obey superposition, i.e. they add.

[Harish Srinivasan]

Classically electric fields are not physical entities although as mentioned by swansont they add up by the principle of superposition.

 

However, quantum mechanically electric fields can be looked upon as virtual photons (from QED). But to me its quite unclear about the math and ideas in QED.

 

 

[Magicatt]

So what if an em wave passes through an electric field?? Any changes in direction of propagation, amplitude etc.?

[swansont]

So what if an em wave passes through an electric field?? Any changes in direction of propagation, amplitude etc.?

No. Photons do not get deflected by E or B fields.

[Enthalpy]

2-3 years ago an experiment was started in Italy to check if a magnetic field in vacuum would rotate even a tiny little bit the polarization of light. Since then, no result, so it must be negative despite the sensitivity.

[EMField]

There is no option but to think EM fields can affect light. According to "standard" cosmology, a photon has no mass, so would be unaffected by gravity. Since all light is EM radiation and is caused by electric and magnetic fields, no other conclussion is possible. Only when the field strength is strong enough, large stars or galaxies, is light affected due to its velocity.

 

http://en.wikipedia..../Faraday_effect

 

 

 

Light can interact with the energy in materials, so can not be chargeless.

http://en.wikipedia....pton_scattering

 

 

Modulate the frequency of light (its EM property) and you can bend a beam of light without gravity needed, so argue all you want that EM fields can not bend light, you just do not have any powerful enough

http://news.sciencem...-by-itself.html

 

 

 

Something basic for you

http://www.colorado....calculator.html

 

 

 

Light bends all the time without gravity.

http://ww2010.atmos....t/mch/diff.rxml

 

 

 

Oh and one question, if photons have neither mass or charge or magnetism, then just how are they the carriers of the electromagnetic force since they have none according to "standard" science? It is impossible for a photon to be the EM force carrier and not posess any EM force. Oh, wait, I know, magic!

 

 

E=mc^2, learn what it means.

Edited September 7, 2012 by EMField

[swansont]

There is no option but to think EM fields can affect light. According to "standard" cosmology, a photon has no mass, so would be unaffected by gravity. Since all light is EM radiation and is caused by electric and magnetic fields, no other conclussion is possible.

Well, then, it should be no trouble for you to find an experiment that confirms this. None of your links address this.

[mooeypoo]

!

Moderator Note

EMField, this is a mainstream thread that deals with a specific question. The rules of the forum clearly states that questions in mainstream threads are answered with mainstream science. Keep your pet theories to your own thread in the speculation forums, and do not post them as replies to mainstream questions. Please do not hijack threads with your own take on what science means.

Do not make things worse by replying to this message.

[EMField]

http://en.wikipedia.org/wiki/Dielectric

The electric susceptibility χ_e of a dielectric material is a measure of how easily it polarizes in response to an electric field. This, in turn, determines the electric permittivity of the material and thus influences many other phenomena in that medium, from the capacitance of capacitors to the speed of light.

 

Not hard to do if one bothers to do any research. EM fields affect everything.

[swansont]

http://en.wikipedia.org/wiki/Dielectric

 

 

Not hard to do if one bothers to do any research. EM fields affect everything.

Just to note (since EMField is now banned) that a dielectric is made of matter and is not light. Light interacts with the matter.