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Results tagged with time
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user 43593
Time is defined operationally to be that which is measured by clocks. The SI unit of time is the second, which is defined to be "the duration of $9, 192, 631, 770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium $133$ atom."
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What is the difference between UT0, UT1 and GMT time?
UTC is time as measured by atomic clocks. The second is always the exact same amount of time. Unfortunately the earth's movement isn't so exact. … So, the powers that be insert a 'leap second' every so often on Dec 31 or June 30, and the time is then 23:59:60 for just that second. …
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