A clock is an instrument used for measuring time, and is one of the oldest human inventions, predated by the sundial. It often consists of a face with numbers or lines from one through twelve, and an hour, minute, and sometimes second hand. Other clock faces may display the time digitally. Clocks may be freestanding, hung on the wall, or worn on the wrist as a watch.
Authored by AH. Last updated 2014-11-04 14:51:24.
Atomic clocks keep time by means of quartz crystals and periodic radio-controlled synchronization with the NIST atomic clock. Visitors to this website will find comparisons of radio-controlled clocks and watches.
A wall clock can serve as a stylish wall decoration in addition to telling time. Modern wall clocks use quartz movements run by battery power, while traditional wall clocks may rely on weights and pendulums.
Clocks are used throughout the world as a means of telling time. Atomic clocks in particular are trusted as the time-telling standard since they are the most accurate measurement available. This atomic clock shows both hands pointing to the twelve.
Cuckoo clocks may be relatively simple or incredibly detailed. This ornate wooden hand-carved cuckoo clock shows the time at almost two o-clock. The detailed carvings include a man chopping wood, two men drinking ale, and several people on the balcony.