It is claimed that two caesium clocks if allowed to run for \(100\) years, free from any disturbance, may differ by only about \(0.02~\text s.\)What does this imply for the accuracy of the standard caesium clock in measuring a time interval of \(1~\text s\)?
1. \(6\times10^{-12}~\text s\)
2. \(6\times10^{-10}~\text s\)
3. \(6\times10^{-8}~\text s\)
4. \(6\times10^{-6}~\text s\)
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