Clock showing the exact time

D shows the time of day. But over time, that is likely to change. How long does a hundred really last? In the blink of an eye! The measure of international time was linked to the time of the Earth's orbit around the Sun. If the earth completes one cycle of the sun, then one year is considered to have elapsed, but there is no accuracy in it. At the site of the 19th Cesium Clock, time was adopted as the standard of international calculation.

The molecule of cesium shakes 211,150 times a second and never fluctuates in its duration. The composition of the cesium clock is complex. It heats the liquid cesium to form gas. Microwaves are produced by passing gas molecules between two electromagnetic. It is then arranged to blink every hundred seconds. The entire instrument is protected from the electromagnetic force of the atmosphere.