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Define the SI unit of time. (or) What is...

Define the SI unit of time. (or) What is one second in SI system of units?

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Secon is the SI unit time. One second is the duration of 9,192,631,770 periods of radiation corresponding to the transition between the two hyperfine levels of the ground state of Cesium -133 atom.
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Knowledge Check

  • SI unit of temperature is ____

    A
    fahrenheit
    B
    joule
    C
    celsius
    D
    kelvin

  • SI unit of foce is :

    A
    Dyne
    B
    newton
    C
    `kgms^(-1)`
    D
    Joule

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    Write the SI unit of speed.

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