# Louis broglie doctoral thesis

Pollen grains image taken on an electron microscope, an application of the de Broglie hypothesis.

## De broglie phd thesis

Generalization of the principle of least action[ edit ] In the second part of his thesis, de Broglie used the equivalence of the mechanical principle of least action with Fermat's optical principle : "Fermat's principle applied to phase waves is identical to Maupertuis' principle applied to the moving body; the possible dynamic trajectories of the moving body are identical to the possible rays of the wave. Pollen grains image taken on an electron microscope, an application of the de Broglie hypothesis. This was demonstrated by the electron diffraction experiment of Davisson and Germer , thus confirming the hypothesis of de Broglie, who was awarded the Nobel Prize for Physics in , just five years after he had presented that bold doctoral thesis. He applied himself first to literary studies and took his degree in history in Originally, de Broglie thought that real wave i. The de Broglie—Bohm theory is today the only interpretation giving real status to matter-waves and representing the predictions of quantum theory. Credit: Dartmouth College In addition, he was the first world-renowned scientist who called for countries to join forces to meet the great challenges of science in multinational laboratories. It was later edited and republished in Nobel Lectures. This wavefunction gives an appearance of wave behavior to matter, without making real physical waves appear. After studying in depth for several years the bases of quantum physics established by Max Planck and Albert Einstein, he presented his thesis in with an important theoretical discovery: electrons behave as waves and, not only that, all particles and objects are associated with matter waves. To cite this document, always state the source as shown above. Up to his final work, he appeared to be the physicist who most sought that dimension of action which Max Planck , at the beginning of the 20th century, had shown to be the only universal unity with his dimension of entropy. Elected a member of the Academy of Sciences of the French Institute in , Louis de Broglie has been its Permanent Secretary for the mathematical sciences since Rapport au 5e Conseil de Physique Solvay, Brussels, Then, as his liking for science prevailed, he studied for a science degree, which he gained in

However, this generalization was statistical and was not approved of by de Broglie, who said "that the particle must be the seat of an internal periodic movement and that it must move in a wave in order to remain in phase with it was ignored by the actual physicists [who are] wrong to consider a wave propagation without localization of the particle, which was quite contrary to my original ideas.

The ideas set out in that work, which first gave rise to astonishment owing to their novelty, were subsequently fully confirmed by the discovery of electron diffraction by crystals in by Davisson and Germer; they served as the basis for developing the general theory nowadays known by the name of wave mechanics, a theory which has utterly transformed our knowledge of physical phenomena on the atomic scale.

And then some very strange things would happen: for example, one electron would be able to traverse two different holes at the same time. He applied himself first to literary studies and took his degree in history in He has published numerous notes and several papers on this subject, and is the author of more than twenty-five books on the fields of his particular interests.

## De broglie postulate

In addition, he believed that the true mass of particles is not constant, but variable, and that each particle can be represented as a thermodynamic machine equivalent to a cyclic integral of action. I think that, of all the ideas that I've introduced in quantum theory in these past years, it's that idea that is, by far, the most important and the most profound. Incredibly, Louis de Broglie, with his first great scientific research, succeeded in laying one of the pillars of quantum physics: the wave—particle duality, which states that waves can behave like particles and vice versa. However, this generalization was statistical and was not approved of by de Broglie, who said "that the particle must be the seat of an internal periodic movement and that it must move in a wave in order to remain in phase with it was ignored by the actual physicists [who are] wrong to consider a wave propagation without localization of the particle, which was quite contrary to my original ideas. Authors: Andrei P. But, with my actual ideas, it's Dynamics that appear to be a simplified branch of Thermodynamics. CERN the European Organization for Nuclear Research was born of this request, and his long life he passed away at age 94 allowed him to see the exceptional achievements of this particle physics laboratory inspired by his scientific vision. This was demonstrated by the electron diffraction experiment of Davisson and Germer , thus confirming the hypothesis of de Broglie, who was awarded the Nobel Prize for Physics in , just five years after he had presented that bold doctoral thesis. English translation: Introduction to the Vigier Theory of elementary particles, Elsevier, Amsterdam, Ondes et mouvements Waves and motions , Gauthier-Villars, Paris, After studying in depth for several years the bases of quantum physics established by Max Planck and Albert Einstein, he presented his thesis in with an important theoretical discovery: electrons behave as waves and, not only that, all particles and objects are associated with matter waves.

Elected a member of the Academy of Sciences of the French Institute inLouis de Broglie has been its Permanent Secretary for the mathematical sciences since Although in his scientific career was still short, when he presented his doctoral thesis the French physicist had already done other research, which had led him to clash with some of the most influential physicists of the moment.

His last work made a single system of laws from the two large systems of thermodynamics and of mechanics: When Boltzmann and his continuators developed their statistical interpretation of Thermodynamics, one could have considered Thermodynamics to be a complicated branch of Dynamics.

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