Einstein's theory said that the speed of light is a constant (around 1000000000 km/h). Some weeks ago I've been reading an article at slashdot.org that scientists have been able to slow down light to 65 km/h.
Since I didn't read Einstein's theory I have a problem now. :)
If Einstein said that the speed of light is around 1000000000 km/h and the scientists have slowed it down to 65 km/h then Einstein was wrong about the constant speed, right? But if Einstein said that the speed of light is a constant, not mentioning the actual speed of it or mentioning that the speed of light in a vacuum is 1000000000 km/h, then the speed of light in some other medium can be still a constant, but at different speed, right? So both, Einstein and scientists, can be correct, right ?
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Einstein stated that the speed of light is constant no matter who the observer is. Therefore, whether or not I am moving in the direction of the light, or against it, the speed of light is constant. Its speed in different mediums such as air/vacuum is a different thing.
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