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scientists in the 1950s devised a better clock, one based not on astronomical processes but on the movement of fundamental bits of matter — atoms — whose subtle vibrations are, for all intents and purposes, locked in for eternity. Today, one second is defined as "9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom". |
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Answer» Just what is a second, exactly? The question has been open to INTERPRETATION EVER since the first long-case grandfather CLOCKS began marking off SECONDS in the mid-17th century and introduced the concept to the world at large.The answer, simply, is that a second is 1/60th of a minute, or 1/3600th of an HOUR. But that’s just pushing the question down the road a bit. After all, what’s an |
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