Writer And Geek Show

Definition of timeA secondThe duration of 9,192,631,770 periods of the radiation corresponding to the transition between two hyperfine levels of ground state of the Cesium 133 atom.That’s lovely, but what does it mean? Hang on tight, we’ll come to that. But before that, let’s go back in history, few thousand years. To the land of mighty Egyptians. Yeah, you just thought of Pyramids and the movie Mummy, didn’t you? Yeah, moving along!Sun to the rescueTimekeeping became a necessity when humans started being social. As with everything on earth, it all started with Sun. Being the source of a vast amount of energy in the form of light, what better way of tracking time than to use that light.Egyptians - the timemastersObelisks: An Egyptian invention. Shadows are tracked to calculate the time of day.Sundial: A device that uses shadow cast by sunlight to measure time as the sun moves overhead. Egyptians used these in B.C. 3500. In 1500 B.C. Egyptians built a more accurate sundial which was divided into 10 parts. This