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Originally Posted by jay_21
If you are talking about time travel....Do you think it is good idea to talk about minutes and seconds????
I don't know much about these things But Does the measure of time remain same??????? Shouldn't we be takin about space-time  !!! |
The definition of a second remains unchanged.
The speed of light is defined exactly as 299,792,458 m/s. A second is defined by the frequency associated with a specific electron transition in a cesium atom. (see atomic clocks for more details). Using these two things, we can now define the meter.