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Quantum Physics - Etienne Klein How was quantum physics born? During the 1920s, physics underwent a major upheaval: physicists understood that atoms, these grains of matter that they had discovered a few years earlier, do not obey the laws of usual physics. They had to uncover new concepts, new principles, new rules. In the space of a few years, the material world became unrecognizable: quantum physics had just been born, that of the infinitely small. Etienne Klein, physicist and philosopher, professor at Centrale Paris, research director at CEA, presents this physics to us over the course of three sessions. source: site of the city of science and industry http://www.cite-sciences.fr/fr/accueil/ LEAVE A THUMB IF YOU LIKED THIS VIDEO TO SUPPORT THE CHANNEL SUBSCRIBE AND ACTIVATE THE BELL TO NOT MISS THE OTHER VIDEOS FOLLOW THE CHANNEL ON SOCIAL NETWORKS facebook / puppaseb twitter https://twitter.com/SebPuppa?lang=fr welcome to my channel which is intended to disseminate scientific knowledge in different fields which can be from theoretical physics to computer science, social sciences or even conferences on history, in short this is everything that fascinates me, which makes many possible fields. YouTube channel dedicated to bringing together the maximum number of conferences on a maximum number of subjects in the same place.