Download E-books Combien dure une seconde ? - La saga des horloges atomiques: La saga des horloges atomiques PDF

Longtemps, on a évalué le temps qui passe à partir du mouvement
obvious du Soleil, c'est- à-dire à partir de l. a. rotation de los angeles Terre sur elle-même. Il y a quelques décennies, les physiciens ont redéfini l. a. seconde à partir de propriétés fondamentales des atomes. remark ? Pour quoi faire ? Ce livre à l. a. fois scientifique et de vulgarisation raconte l'histoire de cette unité de temps universelle.

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