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It is claimed that tow cesium clocks, if...

It is claimed that tow cesium clocks, if allowed to run for 100 years, free from any disturbance, may differ by only about 0.02s. What does this imply for the accuracy of the standerd secium clock in measuring a time interval os 1s ?

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Error is 100 year = 0.02s
`Error in 1 sec = (0.02s)/(100xx365(1)/(4)xx24xx60xx60) = (2xx10^(-2)xx4)/(1461xx24xx35xx10^4) = 7.9xx10^(13) s~~ 10^(-12)s`
Hence, the accuracy of the standerd cesium clock in measuring a time interval of 1 s is `10^(-12)s`
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