Electron Filmed In Motion For First Time

What you see is basically a single oscillation of light and the “energy distribution of the electron” in slow motion.
It takes about 150 attoseconds for an electron to circle the nucleus of an atom. An attosecond is 10⁻¹⁸ seconds long, or, expressed in another way: an attosecond is related to a second as a second is related to the age of the universe.
Although not a capture of movement in the traditional sense but rather a representation of the electron's energy distribution, it is the still the first filmed sequence of the entire event, as opposed to previous attempts that used indirect methods.
More info: Science Daily Attosecond Physics

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With the use of a newly developed technology for generating short pulses from intense laser light, scientists in Sweden have managed to capture the electron's motion for the first time.