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Most Precise Atomic Clock Ever Built Will Only Lose a Second Every 30 Billion Years (gizmodo.com)

submitted 4 months ago by [email protected] to c/[email protected]

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[–] [email protected] 0 points 4 months ago (2 children)

What do you set it to?

[–] [email protected] 19 points 4 months ago (1 children)

In clocks like this, the "set time" is often irrelevant. It's more important to know exactly how much time has passed since the last time the clock was "checked." If you're running a radio transmitter at 6ghz, that's 6 billion cycles per second. If you synch your transmitter to your clock once per second, it had better be accurate to the billionth of a second.

[–] [email protected] 10 points 4 months ago (1 children)

This. Clocks like this are for measuring duration in a scientific context.

[–] [email protected] 2 points 4 months ago* (last edited 4 months ago) (1 children)

Or tech, like GPS.

[–] [email protected] 1 points 4 months ago

Oh duh, yeah. The most obvious example.

[–] [email protected] 1 points 4 months ago

The other atomic clocks that are averaged to give us our ground truth for time.