The Full Wiki

Louis de Broglie: Wikis


Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.


From Wikipedia, the free encyclopedia

Louis de Broglie

Born 15 August 1892(1892-08-15)
Dieppe, France
Died 19 March 1987 (aged 94)
Louveciennes, France
Nationality French
Fields Physics
Institutions Sorbonne
University of Paris
Alma mater Sorbonne
Doctoral advisor Paul Langevin
Doctoral students Jean-Pierre Vigier
Alexandru Proca
Known for Wave nature of electrons
de Broglie wavelength
Notable awards Nobel Prize in Physics (1929)

Louis-Victor-Pierre-Raymond, 7th duc de Broglie, FRS (English pronunciation: /dəˈbrɔɪ/; French: [də bʁœj]  ( listen); 15 August 1892 – 19 March 1987) was a French physicist and a Nobel laureate. He was the sixteenth member elected to occupy seat 1 of the Académie française in 1944, and served as Perpetual Secretary of the Académie des sciences, France.



De Broglie was born in Dieppe, Seine-Maritime, younger son of Victor, 5th duc de Broglie and a descendant of Madame de Staël. 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. He never married. When he died in Louveciennes, he was succeeded as duke by a distant cousin, Victor-François, 8th duc de Broglie.

De Broglie had originally intended a career in humanities, and received his first degree in history. Afterwards, though, he turned his attention toward mathematics and physics. With the outbreak of the First World War in 1914, he offered his services to the army in the development of radio communications.

His 1924 doctoral thesis, Recherches sur la théorie des quanta (Research on Quantum Theory), introduced his theory of electron waves. This included the wave-particle duality theory of matter, based on the work of Albert Einstein and Max Planck on light. The thesis examiners, unsure of the material, passed his thesis to Einstein for evaluation who endorsed his wave-particle duality proposal wholeheartedly; de Broglie was awarded his doctorate. This research culminated in the de Broglie hypothesis stating that any moving particle or object had an associated wave. De Broglie thus created a new field in physics, the mécanique ondulatoire, or wave mechanics, uniting the physics of light and matter. For this he won the Nobel Prize in Physics in 1929. Among the applications of this work has been the development of electron microscopes to get much better image resolution than optical ones, because of the shorter wavelengths of electrons compared with photons.

In his later career, de Broglie worked to develop a causal explanation of wave mechanics, in opposition to the wholly probabilistic models which dominate quantum mechanical theory. Today, this explanation is known as the de Broglie–Bohm theory, since it was refined by David Bohm in the 1950s.

In addition to strictly scientific work, de Broglie thought and wrote about the philosophy of science, including the value of modern scientific discoveries.

De Broglie became a member of the Académie des sciences in 1933, and was the academy's perpetual secretary from 1942. On 12 October 1944, he was elected to the Académie française, replacing mathematician Émile Picard. 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 an event unique in the history of the Académie, he was received as a member by his own brother Maurice, who had been elected in 1934. UNESCO awarded him the first Kalinga Prize in 1952 for his work in popularizing scientific knowledge, and he was elected a Fellow of the Royal Society on 23 April 1953. In 1961 he received the title of Knight of the Grand Cross in the Légion d'honneur. 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. He established a center for applied mechanics at the Henri Poincaré Institute, where research into optics, cybernetics, and atomic energy were carried out. He inspired the formation of the International Academy of Quantum Molecular Science and was an early member.

Honours and awards


  • Recherches sur la théorie des quanta (Researches on the quantum theory), Thesis, Paris, 1924.
  • Ondes et mouvements (Waves and Motions). Paris: Gauthier-Villars, 1926.
  • Rapport au 5e Conseil de Physique Solvay. Brussels, 1927.
  • La mécanique ondulatoire (Wave Mechanics). Paris: Gauthier-Villars, 1928.
  • Matière et lumière (Matter and Light). Paris: Albin Michel, 1937.
  • Une tentative d'interprétation causale et non linéaire de la mécanique ondulatoire: la théorie de la double solution. Paris: Gauthier-Villars, 1956.
    • English translation: Non-linear Wave Mechanics: A Causal Interpretation. Amsterdam: Elsevier, 1960.
  • Sur les sentiers de la science (On the Paths of Science).
  • Introduction à la nouvelle théorie des particules de M. Jean-Pierre Vigier et de ses collaborateurs. Paris: Gauthier-Villars, 1961. Paris: Albin Michel, 1960.
    • English translation: Introduction to the Vigier Theory of elementary particles. Amsterdam: Elsevier, 1963.
  • Étude critique des bases de l'interprétation actuelle de la mécanique ondulatoire. Paris: Gauthier-Villars, 1963.
    • English translation: The Current Interpretation of Wave Mechanics: A Critical Study. Amsterdam, Elsevier, 1964.
  • Certitudes et incertitudes de la science (Certitudes and Incertitudes of Science). Paris: Albin Michel, 1966.

See also


External links



Up to date as of January 14, 2010

From Wikiquote

Louis de Broglie (15 August 189219 March 1987) was a French physicist became a Nobel laureate in 1929 for his theory on particle waves.


  • It seems a little paradoxical to construct a configuration space with the coordinates of points which do not exist.
    • La nouvelle dynamique des quanta (1928), translation by Bacciagaluppi, G., Valentini, A. (2009). Quantum Theory at the Crossroads: Reconsidering the 1927 Solvay Conference. Cambridge University Press. p. 380. ISBN 0521814219.  
  • The history of science shows that the progress of science has constantly been hampered by the tyrannical influence of certain conceptions that finally came to be considered as dogma. For this reason, it is proper to submit periodically to a very searching examination, principles that we have come to assume without any more discussion.
  • Two seemingly incompatible conceptions can each represent an aspect of the truth ... They may serve in turn to represent the facts without ever entering into direct conflict.
    • Dialectica, I, 326
  • ... the actual state of our knowledge is always provisional and (...) there must be, beyond what is actually known, immense new regions to discover.
    • in the Foreword of book by David Bohm (1984). Causality and Chance in Modern Physics. Routledge. p. x. ISBN 0415174406.  

External links

Wikipedia has an article about:

Simple English

Louis de Broglie

Louis-Victor-Pierre-Raymond , 7th duc de Broglie, (August 15, 1892March 19, 1987) was a French physicist who discovered that electrons have two natures similar to both particles and waves.

Error creating thumbnail: sh: convert: command not found


Got something to say? Make a comment.
Your name
Your email address