Questions for “Physicists have clocked the shortest time span ever”

The shortest time span ever measured is 247 zeptoseconds. That’s how long it takes light to cross a hydrogen molecule.
peterschreiber.media/iStock / Getty Images Plus
The shortest time span ever measured is 247 zeptoseconds. That’s how long it takes light to cross a hydrogen molecule.
peterschreiber.media/iStock / Getty Images Plus