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No, but then I'm a physics layman. If something's moving in a straight line at speed X, and it goes through a medium still in a straight line, and the time it took to traverse that distance indicates that it had to be moving at X-10, and on the other side of that medium it's back to speed X, I don't see how it didn't slow down. I've read other articles on this, that didn't indicate the medium caused the light to take a circuitous path through the braking medium, so I've been assuming that the light travels a straight line through it. Is that where I'm hung up?
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