Time timeline

By khushi.kudva
  • 1500 BCE

    1500-1300 BC

    1500-1300 BC
    The egyptians were the first to bring up the sundial , the sun’s shadow tells what time of the day / night it is . Ours are longer in summer and shorter in winter.
  • 400 BCE

    400 BC

    400 BC
    The Greeks then invented the water clock ( also known as a clepsydra ) , it measures the flow of water in a cone type of vessel. There are two types of water clocks - inflow & outflow .
  • 1400

    1400s

    1400s
    Mechanical clocks were built in Europe made from a mainspring and balance wheel . not that evolved like the clocks we have now, but still mechanical .

  • 1657

    1657
    Christiaan Huygens invents the first pendulum clock on earth it is capable of far more than any other time telling objects ( the accuracy ). It doesn't work when you are at sea.

  • 1839

    1839
    The telegraph was invented and it has instant transmission of time signals.( in can immediately send time signals )

  • 1905

    1905
    The radio time signal was invented and sent / transported to Washington DC to help ships find longitude .

  • 1949

    1949
    The National Bureau of Standards invents the first atomic clock using ammonia . ( a clock based on the study of atoms )

  • 1967

    1967
    A second is now said as ( scientifically ) 9,192,631,770 vibrations of the cesium atom. So it is more advanced and we can see time by seconds too.

  • 1998

    1998
    Now that they have made watches we have a more advanced way of reading time and almost half a billion watches are sold every year.