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Question

What is the meaning of this?

1 second is the time interval of 9192631770 vibrations of radiation corresponding to the transition between two hyperfine levels of the ground state of caesium 133 atom

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Solution

  1. It is the standard definition of one second ​
  2. Second is the SI unit of time.
  3. According to its definition, one second is that time in which the radiation corresponds to the transition between two hyperfine levels of the ground state of the element Caesium-133 that vibrates 9192631770 times.


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