NPL atomic clock recognized as the most accurate in the world



    The other day, atomic clocks installed in the National Physical Laboratory of Great Britain (National Physical Laboratory, NPL) were recognized as the most accurate clock in the world. It is worth noting that the National Physical Laboratory was founded back in 1900, and it is located near London. The NPL-CsF2 cesium clock is currently used as a standard for checking International Atomic Time and Coordinated Universal Time.

    This watch received the honorary title of "the most accurate watch in the world" from the journal "Metrology", owned by the International Bureau of Weights and Measures. Verification showed that this watch may lag or go ahead by one second in 138 million years. This is unprecedented accuracy, no other watch in the world is capable of counting time with such accuracy. Cesium clocks are one of the most accurate in the world, and the NPL-CsF2 model, as we see, is the most accurate in the world.

    Specialists who developed this watch were able to achieve similar accuracy as a result of reducing the influence of several main sources of measurement error. The main sources of error are the Doppler effect and frequency variation. The time measurement error of this watch is thus reduced to a value of 2.3 × 10–16.

    In the USA, by the way, there is a cesium clock that can count time with an accuracy of up to 3 x 10-16, but, as you can see, the English clock is more accurate.

    Via CNET

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