We have studied that light waves are elctromagnetic waves.So, the path of light should deflect when it comes on the electromagnetic field ? but it not done so,why?

Asked by KAMLESH sahu | 3rd Apr, 2013, 08:46: PM

Expert Answer:

Electromagnetic radiation is coupled electric and magnetic fields traveling as waves at a speed equal to the known speed of light.
Electromagnetic radiation is a particular form of the more general electromagnetic field (EM field), which is produced by moving charges. Electromagnetic radiation is associated with EM fields that are far enough away from the moving charges that produced them that absorption of the EM radiation no longer affects the behavior of these moving charges. These two types or behaviors of EM field are sometimes referred to as the near and far fields. In this language, EMR is merely another name for the far-field. Charges and currents directly produce the near-field. However, charges and currents produce EMR only indirectly—rather, in EMR, both the magnetic and electric fields are associated with changes in the other type of field, not directly by charges and currents. This close relationship assures that the electric and magnetic fields in EMR exist in a constant ratio of strengths to each other.
In Euclidean space, e/m waves do have mass, and all masses, including e/m waves are gravitationally attracted to one another. That is why gravity bends the path of light in Euclidean space. The path of light is the definition of a straight line in Minkowski space-time, which is why light has no mass in general relativity.

If gravity bends the path of light, it stands to reason that an electric field should do the same. It also seems likely that the effect would depend on the polarity of the light relative to the e/m field.

Perhaps, a photon consists of a pair of waves which are affected oppositely by electric and magnetic fields. This idea is supported by the fact that a high-energy photon can sometimes split into an electron-positron pair.

Answered by  | 4th Apr, 2013, 10:43: AM

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