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can anyone explain this to me in terms that I, a layperson, might understand?  Alan Friedman, are you there?  I have always heard the "riding on a beam of light" thought experiment, but don't understand the "stationary local maximum" bit.

thanks in advance

eric siegel

"Einstein, somewhere around 12 or 14, asked himself the question, ``What would a light wave look like if I went with the velocity of light to look at it?'' Now he knew that electromagnetic theory says you cannot have a stationary local maximum. But if he moved along with the velocity of light, he would see a local maximum. He could see a contradiction at the age of 12, 14, or somewhere around there, that everything was not right and that the velocity of light had something peculiar."
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