N rays, super-dielectrics, and microwaves faster than light: improbable discoveries in electromagnetics

Two historical incidents of discoveries by sincere, reputable researchers in electromagnetics that later proved to be false are recounted. It is shown how each case was finally resolved by a visit to the researcher's own laboratory. The ongoing controversy surrounding recent claims that, under certain conditions, microwave signals can travel faster than the speed of light in a vacuum is described, and such a visit is suggested.<
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