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SUMMARY:The remarkable accuracy of the Trinity College Clock - Dr. Hugh Hu
 nt (Dept. of Engineering)
DTSTART:20130224T170000Z
DTEND:20130224T174500Z
UID:TALK43503@talks.cam.ac.uk
CONTACT:Mary Fortune
DESCRIPTION:The Trinity Clock in Great Court is quite a prominent feature 
 of the college\, at least to look at. And it has a rather curious way of a
 nnouncing the hours\, once for Trinity and a second time for St John's. It
  is always within a second or two of the correct time and yet it hardly ev
 er requires adjustment. Does this mean that the mechanism is unaffected by
  the elements? What about temperature\, pressure\, humidity? And does the 
 gravitational pull of the moon make any difference? The pendulum on the Tr
 inity Clock has been instrumented to measure period and amplitude to great
  accuracy. The time is compared with UTC obtained from a GPS receiver. All
  of this data is streamed continuously to the web at http://www.trin.cam.a
 c.uk/clock/. If you thought that the physics of a pendulum was simple\, th
 en think again!\n
LOCATION:Winstanley Lecture Theatre\, Trinity College
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