There are atomic (Cesium) clocks capable of measuring time with an accuracy of 1 part in `10^(11)`. If two such clocks are operated to precision, then after running for 5000 years, these will record a difference of

The accuracy of a clock is one part in 10^(10) . The maximum difference between two such clocks operating for 10^(10) secounds is......

If two celsium clocks differ only by 0.02 s in 200 yaers, what is the accuracy of cesium clock in measuring time intervals ?

Consider Galileo's method of measuring the speed of light using two lanterns. To get an accuracy of about 10%, the time taken by the experimenter in closing or opening the shutter should be about one tenth of the time taken by the light in going from one experimenter to the other. Assume that it takes 1/100 second for an experimenter to close or open the shutter. How far should the two experimenters be to get a 10% accuracy ? What are the difficulties in having this separation ?

Consider Galileo's method of measuring the speed of light using two lanterns. To get an accuracy of about 10%, the time taken by the experimenter in closing or opening the shutter should be about one tenth of the time taken by the light in going from one experimenter to the other. Assume that it takes 1/100 second for an experimenter to close or open the shutter. How far should the two experimenters be to get a 10% accuracy ? What are the difficulties in having this separation ?