I need some help in defining what are the assumptions needed to derive a constant speed of light from Maxwell equations.(adsbygoogle = window.adsbygoogle || []).push({});

Is it correct to say that this result applies to a sinusoidal wave as an assumption? In my understanding that is_{(more or less)}equivalent toplanar waves in vacuum: is it another way to define the context of this derivation?

Sorry, a final doubt: I've read that Maxwell equations say nothing about other frames of observation, so the invariance of speed from this point of view is a postulate of special relativity, not a consequence of Maxwell equations... my question is: have there been any new_{(more modern)}experimental tests related to this postulate in the last couple of years?_{(found some recent articles in the web about CMB and variable speed of light theories)}

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# A Assumptions behind Maxwell's equations for constant speed

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