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From the infinitely small to the infinitely large, covering more than sixty orders of magnitude of spatial dimension, quantum theory is invoked, both to describe the still largely mysterious vibrations of the microscopic strings which could be the elementary constituents of the Universe, that to account for the fluctuations of the microwave radiation which reaches us from the outer reaches of the cosmos. Serge Haroche presents in this lesson the scientific theory that has revolutionized our understanding of nature and extraordinarily enriched our means of action and information on the world.
Physics --- Physical Sciences & Mathematics --- Atomic Physics --- physique atomique --- physique quantique --- atome --- optique
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When physicists began to explore the world of the atom more precisely in an attempt to understand its structure and the laws which govern its behaviour, they soon encountered serious difficulties. Our intuitive concepts, based on our daily experience of the macroscopic world around us, turned out to be totally wrong on the atomic scale; the atom was incomprehensible in classical physics. To unravel these new mysteries, it was therefore necessary, after long trial and error, to develop entirely new concepts, the concepts of quantum mechanics. What are the main steps that led us to this modern vision of the atom? Where is atomic physics currently? What is its contribution to the development of our knowledge and where is it heading?
Physics --- Physical Sciences & Mathematics --- Atomic Physics --- physique atomique --- physique moléculaire --- théorie physique --- physique quantique
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From the infinitely small to the infinitely large, covering more than sixty orders of magnitude of spatial dimension, quantum theory is invoked, both to describe the still largely mysterious vibrations of the microscopic strings which could be the elementary constituents of the Universe, that to account for the fluctuations of the microwave radiation which reaches us from the outer reaches of the cosmos. Serge Haroche presents in this lesson the scientific theory that has revolutionized our understanding of nature and extraordinarily enriched our means of action and information on the world.
Physics --- Physical Sciences & Mathematics --- Atomic Physics --- physique atomique --- physique quantique --- atome --- optique
Choose an application
When physicists began to explore the world of the atom more precisely in an attempt to understand its structure and the laws which govern its behaviour, they soon encountered serious difficulties. Our intuitive concepts, based on our daily experience of the macroscopic world around us, turned out to be totally wrong on the atomic scale; the atom was incomprehensible in classical physics. To unravel these new mysteries, it was therefore necessary, after long trial and error, to develop entirely new concepts, the concepts of quantum mechanics. What are the main steps that led us to this modern vision of the atom? Where is atomic physics currently? What is its contribution to the development of our knowledge and where is it heading?
Physics --- Physical Sciences & Mathematics --- Atomic Physics --- physique atomique --- physique moléculaire --- théorie physique --- physique quantique
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Matière et lumière sont intimement liées dans notre modélisation du monde physique. De l’élaboration de la théorie quantique à l’invention du laser, l’interaction entre atomes et rayonnement a joué un rôle central dans le développement de la science et de la technologie d’aujourd’hui. La maîtrise de cette interaction permet désormais d’atteindre les plus basses températures jamais mesurées. Le refroidissement de gaz d’atomes par la lumière d’un laser conduit à une « matière quantique » aux propriétés radicalement différentes des fluides ordinaires. Ces atomes froids sont à la base d’une nouvelle métrologie du temps et de l’espace, qui trouve des applications dans des domaines aussi divers que la navigation, les télécommunications ou encore la géophysique.
Physics --- Physical Sciences & Mathematics --- Atomic Physics --- Atoms. --- Radiation. --- Radiology --- Chemistry, Physical and theoretical --- Matter --- Stereochemistry --- Constitution --- physique atomique --- laser --- rayonnement --- physique --- atome --- temps --- lumière --- optique
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