Weird Fact Of The Day (2/22/10)

Posted By Ben Goulding, 22 February, 2010 | permalink

Light doesn’t always travel at ‘the speed of light’ – It only goes at that speed (299,792,458 metres per second) when travelling through a vacuum.

Light slows down when it passes through matter. Did you know that we can drive faster than light has travelled? We would actually overtake it on the freeway. In fact, the light would probably get pulled over for going too slowly. That’s because the slowest light has ever been recorded moving at is 38mph, while passing through an ultracold gas of sodium atoms.

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