By firing pulses quintillionths of a second long, physicists study the fleeting motion of an electron leaving two bonded atoms.
possibilities, nature tends to replay one particular scene over and over again: the confrontation between matter and light.
But physicists still don’t know the details of what happens when photons meet atoms and molecules. The play-by-play occurs over attoseconds, which are quintillionths of a second . It takes a special laser that fires attoseconds-long pulses to study such ephemeral phenomena. You can think of the length of a laser pulse a bit like the shutter speed of a camera. The shorter the pulse, the more clearly you can capture an electron in motion.
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