Which is the most accurate clock?

Researchers have created this atomic clock using the atoms of the element ytterbium at the National Institute of Standards and Technology in Boulder, Colorado. They say it could be the most precise method of measuring time in the world.
A.

Why is the atomic clock so accurate?

Well, the natural way that atoms oscillate works similar to a pendulum in an atomic clock. Yet, atomic clocks are more precise because natural atomic oscillations happen at a higher frequency and as a result they are more stable. This is why atomic clocks are one of the most accurate devices we have to tell time.
  • Why is it called the atomic clock?

    In 1945, Isidor Rabi, a physics professor at Columbia University, proposed that atomic vibrations could be used to keep time, based on something he'd developed called atomic beam magnetic resonance . Atomic clocks have never been widely used in consumer products because they are typically large and use too much power.
  • What is one second?

    The second (abbreviation, s or sec) is the Standard International ( SI ) unit of time. One second is the time that elapses during 9,192,631,770 (9.192631770 x 10 9 ) cycles of the radiation produced by the transition between two levels of the cesium 133 atom.
  • What is the International Atomic Time?

    International Atomic Time (TAI) is a time scale that uses the combined output of some 400 highly precise atomic clocks. It provides the exact speed at which our clocks tick. Universal Time (UT1), also known as astronomical time, refers to the Earth's rotation.

Updated: 17th October 2019

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