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	Louis, 7th duc de Broglie - Wikipedia, the free encyclopedia
		Louis-Victor-Pierre-Raymond, 7th duc de Broglie, generally known as Louis de Broglie (August 15, 1892–March 19, 1987), was a French physicist and Nobel Prize laureate.
		Louis de Broglie became a member of the Académie des sciences in 1933, and was the academy's perpetual secretary from 1942.
		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.
	en.wikipedia.org /wiki/Louis_de_Broglie (830 words)

	De Broglie hypothesis - Wikipedia, the free encyclopedia
		The de Broglie relations show that the wavelength is inversely proportional to the momentum of a particle and that the frequency is directly proportional to the particle's kinetic energy.
		The hypothesis was advanced by Louis de Broglie in 1923 in his PhD thesis; he was awarded the Nobel Prize for Physics in 1929 for this work, which made him the first person to receive a Nobel Prize on a PhD thesis.
		When the De Broglie wavelength was inserted into the Bragg condition, the observed diffraction pattern was predicted, thereby experimentally confirming the De Broglie hypothesis for electrons.
	en.wikipedia.org /wiki/De_Broglie_hypothesis (603 words)

	Louis-Victor de Broglie - LearnThis.Info Enclyclopedia (Site not responding. Last check: 2007-10-09)
		De Broglie had a mind of a theoretician rather than one of an experimenter or engineer.
		De Broglie was a Fellow of the Royal Society of London.
		He won the Nobel Prize in Physics in 1929 for his discovery of the wave nature of electrons, known as the de Broglie hypothesis or mécanique ondulatoire.
	encyclopedia.learnthis.info /l/lo/louis_victor_de_broglie.html (285 words)

	Tapestry of the God's, v. III, Astro-Rayology (Site not responding. Last check: 2007-10-09)
		Prince Louis-Victor de Broglie of the French Academy, Permanent Secretary of the Academy of Sciences, and Professor at the Faculty of Sciences at Paris University, was born at Dieppe (Seine Inférieure) on 15th August, 1892, the son of Victor, Duc de Broglie and Pauline d'Armaillé.
		His brother Maurice de Broglie was at that time carrying out experimental work on X-rays and this proved a considerable interest to de Broglie during the first few years of the 1920s during which he worked for his doctorate.
		De Broglie's doctoral thesis Recherches sur la théorie des quanta (Researches on the quantum theory) of 1924 put forward this theory of electron waves, based on the work of Einstein and Planck.
	www.makara.us /04mdr/01writing/03tg/bios/Broglie.htm (2194 words)

	ModPhy/Unit1/SpecialRelativity/RelativeView/
		de Broglie wavelength and that that wave circled back on itself and interfered with itself, then only those orbits that had an integral number of wavelengths were stable.
		But the de Broglie hypothesis was based solely upon the assumption of symmetry in the universe and the only evidence that it was true was the theoretical explanation of a theoretical model of the atom that was already known to be incomplete.
		De Broglie Wavelength – The wavelength of a particle as hypothesized by de Broglie.
	physics.tamuk.edu /~hewett/ModPhy1/Unit2/Particles/Particles.html (354 words)

	Wave nature of electron
		Two specific examples supporting the wave nature of electrons as suggested in the DeBroglie hypothesis are the discrete atomic energy levels and the diffraction of electrons from crystal planes in solid materials.
		This wave nature is used for the quantum mechanical "particle in a box" and the result of this calculation is used to describe the density of energy states for electrons in solids.
		Suggested by De Broglie in about 1923, the path to the wavelength expression for a particle is by analogy to the momentum of a photon.
	hyperphysics.phy-astr.gsu.edu /hbase/debrog.html (430 words)

	Planck, Einstein, and de Broglie
		Louis de Broglie proposed that Planck's energy-frequency relationship be extended to all kinds of particles.
		De Broglie's hypothesis was inspired by the fact that wave frequency and wavenumber are components of the same four-vector according to the theory of relativity, and are therefore closely related to each other.
		Planck, Einstein, and de Broglie had extensive backgrounds in classical mechanics, in which the concepts of energy, momentum, and mass have precise meaning.
	www.physics.nmt.edu /~raymond/classes/ph13xbook/node73.html (503 words)

	The Wave Nature of Matter
		At first, de Broglie had no idea what he meant by matter being waves, either; it was just a mathematical construct that unexpectedly turned out to be very helpful.
		What de Broglie did was to assume that any particle--an electron, an atom, a bowling ball, whatever--had a "wavelength" that was equal to Planck's constant divided by its momentum...
		According to de Broglie, the wavelength is equal to Planck's constant divided by the object's momentum; Planck's constant is very, very, very tiny, and the momentum of a bowling ball, relatively speaking, is huge.
	www.colorado.edu /physics/2000/quantumzone/debroglie.html (1020 words)

	Quantum Physics: Louis de Broglie: Confirming de Broglie's Matter Waves / WaveLength of Quantum Physics Biography
		De Broglie noted that relativity theory predicts that, when such a particle is set in motion, its total relativistic energy will increase, tending to infinity as the speed of light is approached.
		It was this apparent incompatibility between the tendency of the relativistic energy to increase and the quantum energy to decrease that troubled de Broglie.
		The manner in which de Broglie resolved this apparent contradiction is the subject of the famous 1923 Comptes rendus note [Comptes rendus de l'Académie des Sciences, vol.
	www.spaceandmotion.com /Physics-Louis-de-Broglie.htm (5799 words)

	De Broglie hypothesis: Encyclopedia topic (Site not responding. Last check: 2007-10-09)
		When the De Broglie wavelength was inserted into the Bragg condition (Bragg condition: more facts about this subject), the observed diffraction pattern was predicted, thereby experimentally confirming the De Broglie hypothesis.
		This was a pivotal result in the development of quantum mechanics (quantum mechanics: The branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)).
		Note: in French (French: The Romance language spoken in France and in countries colonized by France) "de Broglie" is pronounced, which sounds close to "de Broy".
	www.absoluteastronomy.com /reference/de_broglie_hypothesis (541 words)

	de Broglie Waves
		In 1924 a young physicist, de Broglie, speculated that nature did not single out light as being the only matter which exhibits a wave-particle duality.
		Tests of this hypothesis would involve demonstrating wave properties of matter at the wavelength given by Eq.(27.10).
		Relatively straightforward tests are offered by diffraction and interference - if a beam of such ``particles'' were shone at a diffraction grating and a diffraction pattern of a series of light and dark fringes results, then one would be forced to adopt the wave picture for this phenomena.
	theory.uwinnipeg.ca /physics/quant/node6.html (284 words)

	Louis victor de broglie - Wikipedia, the free encyclopedia
		Start the Louis victor de broglie article or add a request for it.
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	www.sciencedaily.com /encyclopedia/louis_victor_de_broglie (161 words)

	Untitled Document
		It is this author's conjecture that there are two modes of oscillation within the quantum vacuum: (1) the optic mode of electromagnetic radiation and (2) the acoustic mode of de Broglie waves.
		It is well understood by quantum physicists that one means whereby an atom in an excited state may lose its excitation energy is by the emission of a photon of light.
		In this instance there is a transition between resonant de Broglie wave states in the atom.
	www.csupomona.edu /~rdeagleton/Triunity/dBwhtml/mrrel.html (722 words)

	HSC Online
		The De Broglie proposal on a wave like character for matter had little direct effect until the discovery of the wave like character of electrons.
		The ideas presented in the De Broglie PhD thesis resulted in the birth of a new science of quantum mechanics.
		This confirmed the De Broglie hypothesis of a wave nature for matter (the electrons were recognised as matter) for the first time.
	hsc.csu.edu.au /physics/options/quanta_quarks/3005/phy982.html (898 words)

	PhysOrgForum Science, Physics and Technology Discussion Forums -> Quantum Unreality becomes Quantum Reality
		The de Broglie wave expresses the fact that a "particle" really is a wave that is progressing in a fixed path within the the particle periphery at the speed of light.
		This alternative postulate is simply the de Broglie wave hypothesis with the condition that the waves propagate at the speed of light.
		Our new hypothesis is also consistent with the Dirac equation for the electron, in which the velocity operator has eigenvalues of magnitude c.
	forum.physorg.com /index.php?showtopic=4890&view=getlastpost (3680 words)

	Modern Physics - PH025
		Louis de Broglie reasoned that since light has both wave and particle characteristics, perhaps matter does as well (by symmetry).
		After this they noticed that the electrons scattered with different intensity at different angles, a completely unexpected result which was later described by the de Broglie wave hypothesis.
		In a wave theory of electrons, the de Broglie wave of a single electron is described by a wave function
	physics.westmont.edu /courses/p025/review/ch5 (1786 words)

	The rates of Reaction (Site not responding. Last check: 2007-10-09)
		First we shall use Bohr's hypothesis regarding the quantization of angular momentum to derive the energy levels of atomic hydrogen.
		In the second part of the lecture we shall see how the hypothesis used by Bohr encouraged De Broglie to propose wavelike properties for electrons.
		Finally, we shall see how De Broglie's proposal was verified in 1927 by the experiments of Davisson and Germer.
	www.owlnet.rice.edu /~chem152/lecture/Outlines/lec08.html (85 words)

	PHSchool - AP* Lesson Plans
		Discuss the de Broglie Hypothesis and state the circumstances under which the wave nature of matter is observed.
		De Broglie's Hypothesis, Heisenberg's Uncertainty Principle, and topics from elementary atomic physics require one and one-half blocks.
		Stress that the meaning of de Broglie waves is that we can picture particles like electrons in two ways.
	www.phschool.com /advanced/lesson_plans/phys_wilson_2000/week29.html (578 words)

	[No title]
		The classical principles that work in the macro-world are inadequate in the nano-world and need to be supplemented by the de Broglie hypothesis (see later, 7th great idea).
		This seventh great idea, the corner stone of quantum mechanics, is de Broglie's hypothesis that matter has wave-like properties and is, therefore, subject to interference phenomena (constructive and destructive) normally associated with wave-like phenomena.
		This is especially important for the light-weight electron and is the idea that is necessary to explain the chemical bond, and atomic and molecular stability, and atomic and molecular structure, and atomic and molecular spectroscopy.
	www.users.csbsju.edu /~frioux/gillespie.htm (2361 words)

	Heisenberg's Uncertainty Principle
		The proton and the neutron are considerably bigger than the electron, but their speeds are negligible, meaning that their de Broglie wavelengths are also much larger than their sizes.
		This is resolved by recognizing that the measurement error in momentum, as implied by the Heisenberg’s uncertainty principle, is caused by the inability (of a classical tool) to determine the exact location of the quantum entity within its de Broglie’s wavelength.
		Some may argue that if a classical entity is sitting still, its de Broglie’s wavelength should be the average wavelength of all quantum entities belong to it.
	www.thinhtran.com /heisenberg.html (3269 words)

	PhysOrgForum Science, Physics and Technology Discussion Forums -> Calabi Yau Spaces Good Elf?
		The circumference of a "particle' is a reflection of the relativistic length contraction by virtue of "spin" and the direction of propagation on the "surface" of the complex space.
		This is the be Broglie frequency mentioned before and reflects the scale of the space.
		This is "emphasizing" the de Broglie properties of a particle (...its wavelike nature) rather than as a packet.
	forum.physorg.com /index.php?showtopic=2183 (7152 words)

	PLOC - Physics Laboratories Online Courses (Site not responding. Last check: 2007-10-09)
		Calculation of the de Broglie wavelength of the wave associated with the moving electrons and observation of its dependence on the linear momentum of the electron.
		In 1923 de Broglie suggested that since light is dualistic in nature, behaving in some situations like waves and in others like particles, the same might be true for matter.
		They were studying the surface of a crystal of nickel by directing a beam of electrons at the surface and observing the electrons reflected at various angles.
	user.7host.com /mhyousef/210/210ex11.asp (845 words)

	NewIBH2 html
		5.6 Apply de Broglie's equation to the diffraction of an electron beam by a thin crystal.
		E.4.3 Describe the de Broglie hypothesis and discuss its implications for matter.
		E.4.4 Discuss experimental predictions and confirmations of the de Broglie hypothesis.
	www.fccps.k12.va.us /gm/science-page/Physics_Syllabus/IBH2.htm (3119 words)

	Tomorrow is physics without paradoxical theories
		In 1923, Compton had proven that X-rays consist of particles – corpuscles, and De Broglie had made the assumption that material particles, as radiation, had a dual character.
		The de Broglie hypothesis, which identifies the electron as a wave, is its basis.
		This is an absurd hypothesis and as a result, Schroedinger’s equation does not adequately describe real atomic processes.
	www.wbabin.net /sukh/tomorrow.htm (2427 words)

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