XLEAP allows scientists to see attosecond

[The Eternal Flame]

Dec 04, 2019 Scientists at the Department of Energy’s SLAC National Accelerator Laboratory have invented a way to observe movements of electrons with powerful bursts of an X-ray laser. The new technique allows scientists to measure electron movements using laser bursts that are only 280 attoseconds. An attosecond is a billionth of a billionth of a second.

https://www.slashgear.com/xleap-allows-scientists-to-see-attosecond-electron-motions-04602246/