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Dale
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No, electric field does not imply electric charge. See Maxwell's vacuum equations.Barry_G said:Does electric field not imply electric charge?
Maxwell's equations. The key property of Maxwell's equations that lead to this is the linearity. The linearity of Maxwell's equations shows that EM follows the principle of superposition which in turn implies that an EM field won't be altered by passing through an external static electric or magnetic field.Barry_G said:All I am asking is if photon is electromagnetic field why can not be influenced by an external electric or magnetic field. What equation explains that?
http://en.wikipedia.org/wiki/Superposition_principle