What is a clock & how does it work?

(February 2022) A clock is a device that tells the time. Some clocks can only show the time. Other clocks can show other things. For example, some clocks can show the date as well as the time, or show other information, like the timer temperature or the weather, some have stopwatch and some have alarm. Clocks use different ways to measure time.

What is the difference between a clock and a watch?

clock, mechanical or electrical device other than a watch for displaying time. A clock is a machine in which a device that performs regular movements in equal intervals of time is linked to a counting mechanism that records the number of movements. All clocks, of whatever form, are made on this principle. See also atomic clock; nuclear clock.

How do clocks measure time?

Clocks use different ways to measure time. Clocks need some sort of steady beat or motion to track the change in time. Ancient water clocks worked by the steady movement of water from a container with a hole in the bottom to another container without a hole. Other clocks use pendulums, springs and gears to track the change in time correctly.

What is a word clock?

Word clocks are clocks that display the time visually using sentences. E.g.: "It's about three o'clock." These clocks can be implemented in hardware or software. Some clocks, usually digital ones, include an optical projector that shines a magnified image of the time display onto a screen or onto a surface such as an indoor ceiling or wall.