The Nobel Prize in Physics 2023 was awarded to Pierre Agostini, Ferenc Krausz and Anne L’Huillier “for experimental methods that generate attosecond pulses of light for the study of electron dynamics in matter”. In the world of electrons, changes occur in a few tenths of an attosecond. An attosecond is one billionth of a billionth of a second. Experiments with such short pulses of light make it possible to provide images of processes taking place inside atoms and molecules. In 2001, Ferenc Krausz was able to isolate a single light pulse that lasted 650 attoseconds.