A wooden wall clock with pendulum and Roman numerals hangs on a white wall. The rhythmic tick tock of the wall clock lets you know that time is passing. As the large hand moves from numeral to numeral, the days begin and end.
A silver wall clock with a white face and black hands is photographed on a bright green wall. The time reads 9:30. The clock is photographed slightly off center, so not all numbers are visible. A light reflects off the silver portion of the wall clock.
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.