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Look at hiiim (lemmy.world)
submitted 7 months ago by nifty@lemmy.world to c/memes@lemmy.world

Reposting bc I dun goofed before

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[-] SlopppyEngineer@lemmy.world 2 points 7 months ago

"The second [...] is defined by taking the fixed numerical value of the caesium frequency, ΔνCs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9192631770 when expressed in the unit Hz, which is equal to s−1.[1]"

[-] Klear@sh.itjust.works 1 points 7 months ago

Those definitions are picked to be as immutable, unambiguous and easily replicated in a lab as possible, but have nothing to do why a second is defined like that.

But did you know that if you tie exactly 1m of string to some heavy object, it will swing once per second?

this post was submitted on 15 Feb 2024
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