General / Article


, Volume 16, Issue 1, pp 29-37

First online:

Sundials: Ancestors of our clocks

  • P. D. AnoopAffiliated withDepartment of Physics, Vishwa Vidyapeetham Email author 

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This article deals with the timekeepers of the past, the sundials. Apart from discussing the structure of a few common sundials, we point out the reasons for the variation between sundial time and the time shown by mechanical timekeepers.


Sundial celestial sphere equation of time time zones daylight saving time