• Question: How many atom seconds are there in one second

    Asked by erkin to Amy, Sarah, Will on 21 Jun 2012.
    • Photo: Sarah Martin

      Sarah Martin answered on 21 Jun 2012:

      Hi erkin,

      Great question! Our time second has been defined as the time it takes for a caesium 133 atom to oscillate 9,192,631,770 times! So that’s super-fast!

      🙂 Sarah

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