Two clocks are being tested against a standard clock located in a national laboratory. At
12:00:00 noon by the standard clock, the readings of the two clocks are
Clock 1 | Clock 2 | |
Monday | 12:00:05 | 10:15:06 |
Tuesday | 12:01:15 | 10:14:59 |
Wednesday | 11:59:08 | 10:15:18 |
Thursday | 12:01: 50 | 10:15:07 |
Friday | 11:59:15 | 10:14:53 |
Saturday | 12:01:30 | 10:15:24 |
Sunday | 12:01:19 | 10:15:11 |
If you are doing an experiment that requires precision time interval measurements, which
amongst the two clocks will you prefer?
Text Solution
Verified by ExpertsB
The range of variation of time over the seven days of observations is 162 s for clock 1 and 31
s for clock 2. The average reading of clock 1 is much closer to the standard time than the average reading of clock 2. The important point is that a clock's zero error is not as significant for precision work as its variation. It is because the zero error can be easily corrected. Hence, clock 2 is to be preferred over clock 1.
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