摘要

The conceptually simple problem of plane electromagnetic (EM) waves in moving media is used to illustrate differences between the conventional Lorentz transformation of electrodynamics and the new relativistic transformation of electrodynamics, which has been recently proposed. The problem is first examined in accordance with the conventional Lorentz transformation. Peculiarities are pointed out for the case where plane EM waves propagate in a medium which moves with 'superluminal' speeds against the waves. By contrast, those found peculiarities are resolved by the new relativistic transformation. Reasons why the usual Lorentz transformation of electrodynamics does not fulfill the principle of relativity are given. The conventional interpretation of the principle of relativity should be examined critically.