For those who don't know, Louis Essen was the man who defined the speed of light, invented atomic clocks, and also gave us our measurement of time (ie. the second). In other words, he knew a thing or two about time and the propagation of waves. Here's what he had to say about Einstein's work: Well, I can say from experience that he's not wrong regarding the beliefs of the common physicist: most I have known simply accept what they're been told regarding relativity because it's in all the books. That weight of perceived authority is enough to convince most that it must be true. Even those who freely admit they don't really understand the theory they accept and support. I'm not saying it's right or wrong, merely presenting Essen's opinion. NOTE: Stay on topic! Think before posting!