There’s a new record for the shortest time measurement: how long it takes light to cross a hydrogen molecule

There’s a new record for the shortest time measurement: how long it takes light to cross a hydrogen molecule
By Paul M. Sutter

To measure small differences in time, you need a really tiny clock, and researchers in Germany have discovered the smallest known clock: a single hydrogen molecule. Using the travel of light across the length of that molecule, those scientists have measured the smallest interval of time ever: 247 zeptoseconds. Don’t know what a “zepto” is? …

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October 26, 2020 at 08:43PM
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