3 ms·
They do. Most likely the frequency is adjusted during night hours (when there is less fluctuation) such that the average comes to 50 Hz (or 60 Hz in the US). (
by Mindless2112 14y ago
They do. Most likely the frequency is adjusted during night hours (when there is less fluctuation) such that the average comes to 50 Hz (or 60 Hz in the US). (See [1].)
[1] http://en.wikipedia.org/wiki/Electric_clock#Accuracy http://en.wikipedia.org/wiki/Electric_clock#Accuracy