Louis Victor Pierre Raymond de Broglie, 7th duc de Broglie was a French physicist who made groundbreaking contributions to quantum theory. h De Broglie had intended a career in humanities, and received his first degree in history. Louis de Broglie remained in military service throughout the First World War, dealing with purely technical issues. In addition to strictly scientific work, de Broglie thought and wrote about the philosophy of science, including the value of modern scientific discoveries. A far-seeing man, De Broglie saw by the middle of World War II that stronger links between industry and science were becoming necessary. He then considered the possibility that in the case of matter, as well as light and radiation generally, it must be assumed that corpuscles are associated with waves. [25], While attempts at verifying the internal clock hypothesis and measuring clock frequency are so far not conclusive,[26] recent experimental data is at least compatible with de Broglie's conjecture.[27]. These experimental results were not confirmed until 1927, but after that year experimental evidence favoring De Broglie's views greatly increased. Browse 13 louis victor pierre raymond de broglie stock photos and images available, or start a new search to explore more stock photos and images. This experimental confirmation was vital to the survival of his theoretical work. The thesis attracted the attention of Einstein, who publicly expressed his high regard for this work. After graduation, Louis de Broglie as a simple sapper joined the engineering forces to undergo compulsory service. 1953 By A. Abragam, For.Mem.R.S. These publications examined the absorption of X-rays and described this phenomenon using the Bohr theory, applied quantum principles to the interpretation of photoelectron spectra, and gave a systematic classification of X-ray spectra. On 12 October 1944, he was elected to the Académie Française, replacing mathematician Émile Picard. His 1924 thesis Recherches sur la théorie des quanta[16] (Research on the Theory of the Quanta) introduced his theory of electron waves. For this he won the Nobel Prize in Physics in 1929. De Broglie's first two papers were published in 1922. Louis Victor Pierre Raymond de Broglie. [8] The pilot-wave model and interpretation was then abandoned, in favor of the quantum formalism, until 1952 when it was rediscovered and enhanced by David Bohm. Genealogy profile for Raymond Charles Amedee de Broglie. This theory set the basis of wave mechanics. c His efforts to bring industry and science closer together were highly appreciated by the French government, which rewarded him a post as counselor to the French High Commission of Atomic Energy in 1945. Explore {{searchView.params.phrase}} by color family {{familyColorButtonText(colorFamily.name)}} Ink drawing by Sean Keating of Erwin Schrodinger . As a result of criticisms, he temporarily abandoned these theories. The theory has since been known as the De Broglie–Bohm theory. He was awarded the Nobel Prize for Physics in 1929. [22], It remained to extend the wave considerations to any massive particles, and in the summer of 1923 a decisive breakthrough occurred. Louis de Broglie the son of Victor, 5th Duc de Broglie, was born at Dieppe on August 15, 1892. Because of the deaths and imprisonments of Académie members during the occupation and other effects of the war, the Académie was unable to meet the quorum of twenty members for his election; due to the exceptional circumstances, however, his unanimous election by the seventeen members present was accepted. In 1905 Albert Einstein postulated that light must consist of wave packets, or minute corpuscles in rapid motion, later called photons. That idea seems to match the continuous–discontinuous duality, since its dynamics could be the limit of its thermodynamics when transitions to continuous limits are postulated. {\displaystyle c^{2}/v} It was supported by Einstein, confirmed by the electron diffraction experiments of G P Thomson and Davisson and Germer, and generalized by the work of Schrödinger. This research culminated in the de Broglie hypothesis stating that any moving particle or object had an associated wave. Then Max Planck enunciated his quantum theory, according to which radiant energy is always absorbed in finite quantities, or quanta. Up to this time the De Broglie wave could be determined only in the immediate vicinity of the trajectory. They had five children; in addition to Louis, these are: Albertina (1872–1946), subsequently the Marquise de Luppé; Maurice (1875–1960), subsequently a famous experimental physicist; Philip (1881–1890), who died two years before the birth of Louis, and Pauline, Comtesse de Pange (1888–1972), subsequently a famous writer. 1213–1232, Catillon, Foundations of Physics, July 2001, vol. Incidentally, this rejection of the hypothesis of a massless photon enabled him to doubt the hypothesis of the expansion of the universe. In 1925 and 1926, Leningrad physicist Orest Khvolson nominated the de Broglie brothers for the Nobel Prize for their work in the field of X-rays. In fact, the wave aspect of matter was formalized by a wavefunction defined by the Schrödinger equation, which is a pure mathematical entity having a probabilistic interpretation, without the support of real physical elements. In his 1924 PhD thesis, he postulated the wave nature of electrons and suggested that all matter has wave properties. {\displaystyle h} The concept of the Bohr atom led at first to important results, but by about 1920 its usefulness in explaining experimental observations was rapidly declining. 15 August 1892-19 March 1987", Biographical Memoirs of Fellows of the Royal Society, English translation of his book on hidden thermodynamics by D. H. 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He died in 1987. De Broglie was awarded a post as counselor to the French High Commission of Atomic Energy in 1945 for his efforts to bring industry and science closer together. This wavefunction gives an appearance of wave behavior to matter, without making real physical waves appear. Military service: French Army (WWI) French quantum physicist Louis de Broglie introduced his theory of particle-wave duality in 1924. In particular, together with Leon Brillouin and brother Maurice, he participated in establishing wireless communications with submarines. Louis Victor Pierre Raymond de Broglie, 7th duc de Broglie was a French physicist who made groundbreaking contributions to quantum theory. Louis berasal dari keluarga Prancis yang dikenal memiliki diplomasi dan kemiliteran yang baik. That a photon is not quite massless is imposed by the coherence of his theory. In 1927 De Broglie put forward his "theory of the double solution" of the linear equations of wave mechanics, from which he deduced the law that a particle moves in its wave in such a manner that its internal vibration is constantly in phase with the wave that carries it. [21] Another result was the elucidation of the insufficiency of the Sommerfeld formula for determining the position of lines in X-ray spectra; this discrepancy was eliminated after the discovery of the electron spin. But, with my actual ideas, it's Dynamics that appear to be a simplified branch of Thermodynamics. De Broglie won the Nobel Prize for Physics in 1929, after the wave-like behaviour of matter was first experimentally demonstrated in 1927. From early childhood, he had a good memory and could accurately read an excerpt from a theatrical production or give a complete list of ministers of the Third Republic of France. 2 (1939). He soon modified this to his "pilot-wave theory." [19] His funeral was held 23 March 1987 at the Church of Saint-Pierre-de-Neuilly.[20]. Louis de Broglie the son of Victor, 5th Duc de Broglie, was born at Dieppe on August 15, 1892. In the general case, the trajectory of a particle can be determined using Fermat's principle (for waves) or the principle of least action (for particles), which indicates a connection between geometric optics and classical mechanics.[23]. Louis Victor Pierre Raymond de Broglie, 7th duc de Broglie was a French physicist and aristocrat who made groundbreaking contributions to quantum theory. He was also able to predict accurately the splitting of a beam of electrons in a magnetic field and to explain this phenomenon without reference to any hypothetical electron spin. Early life. But his hypothesis was not simply an imaginative attempt to envisage a vague possibility, because his theory was backed up by an elaborate mathematical analysis. 20, no. The French theoretical physicist Louis Victor Pierre Raymond de Broglie (1892-1987) was awarded the Nobel Prize in Physics for his discovery of the wave nature of electrons. With the outbreak of the First World War in 1914, he offered his services to the army in the development of radio communications. 659–664, Learn how and when to remove this template message, Louis-Alphonse-Victor, 5th duc de Broglie, International Academy of Quantum Molecular Science, "History of International Academy of Quantum Molecular Science", "Louis Victor Pierre Raymond de Broglie. After the war he did research on theoretical physics at the Sorbonne, and in 1924 he was awarded his doctorate in science with a thesis on the quantum theory which already contained the basis of all his future work. 7, pp. In 1960, upon the death without heir of his older brother, Maurice, 6th duc de Broglie, also a physicist, he became the 7th duc de Broglie. But in 1954 he developed his original theory, which now envisaged the particle as constantly jumping from one trajectory to another. Birthplace: Dieppe, France Location of death: Paris, France Cause of death: Natur. As a result, De Broglie's theory received much attention from theoretical physicists. No one had then deliberately attempted such an experiment, as the technical difficulties were too great. Prince Louis-Victor Pierre Raymond de Broglie is on Facebook. In 1944 he was elected to the Académie Française. He was the founder of wave mechanics. [10][11] De Broglie became the first high-level scientist to call for establishment of a multi-national laboratory, a proposal that led to the establishment of the European Organization for Nuclear Research (CERN). He had an elder brother, Maurice, who too went on to become a physicist. Fisiceoir a rugadh i nDieppe na Fraince, de chlann uasal ab ea Louis Victor Pierre Raymond de Broglie (1892-1987). In the second part of his 1924 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." In this work, action becomes a sort of opposite to entropy, through an equation that relates the only two universal dimensions of the form: As a consequence of its great impact, this theory brings back the uncertainty principle to distances around extrema of action, distances corresponding to reductions in entropy. Broglie was the second son of a member of the French nobility.

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