What is Pendulum clock?
[[Image:Pendeluhr-01.jpg|thumb|Vienna regulator style pendulum wall clock]] [[Image:Galileo Pendulum Clock.jpg|thumb|138px|Pendulum clock designed by [[Galileo Galilei]] ]] A '''pendulum clock''' is a [[clock]] that uses a [[pendulum]], a swinging weight, as its [[time]]keeping element. It was invented in [[1656]] by [[Christiaan Huygens]]. From the year 1656 until the [[1930s]], the pendulum clock was the world's most [[wikt:accurate|accurate]] way of keeping time. This is what caused it to be used by a lot of people all over the place.It works on principle of periodic motion. {{tech-stub}} [[Category:Clocks]]