Grandfather clocks use the swing of a pendulum, once every second and recorded by metal gears inside the clock, to keep time. Now you know the accuracy of this watch. compare it with an Atomic Clock. built by scientists In 1967. It uses Cesium 133 atoms because they oscillate (vibrate) at the rate of 9,192,631,770 times per second. This produces accuracy within ONE SECOND EVERY 30 MILLION YEARS! Then Scientists in Boulder, Colorado, at the National Institute of Standards and Technology, have built an optical clock that is even more accurate. How? By measuring time with light. Time is now measured in what are called femtosecondsor a million-billionth of a second. Optical frequencies regularly oscillate at one million-billion (1,000,000,000,000,000one quadrillion) times per second.
In summary, only with great time and effort, the finest watchmakers in the world can, at best, devise several kinds of relatively imprecise clocks. Can any honest, fair-minded person then believe that the