Louis de Broglie - Wikipedia, Louis de broglie dissertation

Louis de broglie dissertation

Louis de Broglie is a famous physicist, mostly known for his contributions to the field of quantum mechanics in physics. Quantum mechanics is the study of the physics of the behavior of particles at the atomic and subatomic level. Since its birth in the early 20th century, quantum mechanics has been one of the most mysterious and exciting branches in physics in which its study and research has produced some of our modern inventions, such as the computer, personal electronics, and the laser, among other things. This lesson will examine the experiments and theories of Louis de Broglie that led to his groundbreaking contributions while also exploring his personal life.

Wave-like behavior of matter was first experimentally demonstrated by George Paget Thomson 's thin metal diffraction experiment, [2] and independently in the Davisson–Germer experiment both using electrons, and it has also been confirmed for other elementary particles , neutral atoms and even molecules . The wave-like behavior of matter is crucial to the modern theory of atomic structure and particle physics .

This wavelength is called the de Broglie wavelength . The reason he chose the momentum equation over the energy equation is that it was unclear, with matter, whether E should be total energy, kinetic energy, or total relativistic energy. For photons, they are all the same, but not so for matter.

In the beginning of the 20th century, quantum physics evolved from the idea that energy is conveyed in only certain fixed amounts. An early finding indicated that light can be regarded as both waves and particles. In 1924 Louis de Broglie introduced the idea that particles, such as electrons, could be described not only as particles but also as waves. This was substantiated by the way streams of electrons were reflected against crystals and spread through thin metal foils. The idea had great significance for the continued evolution of quantum mechanics.

Louis de Broglie can be considered as on of the influential person in the physics and chemistry study. He was born in France in 1892. He was the Professor in the Sciences Faculty at Paris University. He worked in France to perform research about general physics, including quantum theory.

Broglie soon gained an interest in science and acquired a degree in physics in 1913. During the World War I, he was enlisted in the French Army. He was posted in the Eiffel Tower, where he had plenty of time to carry out experiments in radio communications and engineering. After the war, Broglie started working with his brother, Maurice, in his lab.

In this thesis (1924) de Broglie developed his revolutionary theory of electron waves, which he had published earlier in scientific journals. ( See de Broglie wave .) The notion that matter on the atomic scale might have the properties of a wave was rooted in a proposal Einstein had made 20 years before. Einstein had suggested that light of short wavelengths might under some conditions be observed to behave as if it were composed of particles, an idea that was confirmed in 1923. The dual nature of light, however, was just beginning to gain scientific acceptance when de Broglie extended the idea of such a duality to matter. ( See wave-particle duality .)

 · Louis de Broglie: Louis de Broglie, French physicist best known for his research on quantum theory and for predicting the wave nature of electrons. He was ...

Louis de Broglie's realization that standing waves exist at discrete frequencies and thus energies is obviously true and important to Quantum Mechanics, yet he continued with the error of the particle concept and thus imagined particles moving in a wavelike manner! Nonetheless, as he was close to the truth he had considerable success with his theory as Einstein confirms;

Perrin (1926)  · Compton / C. Wilson (1927)  · O. Richardson (1928)  · De Broglie (1929)  · Raman (1930)  · Heisenberg (1932)  · Schrödinger / Dirac (1933)  · Chadwick (1935)  · Hess / C. D. Anderson (1936)  · Davisson / Thomson (1937)  · Fermi (1938)  · Lawrence (1939)  · Stern (1943)  · Rabi (1944)  · Pauli (1945)  · Bridgman (1946)  · Appleton (1947)  · Blackett (1948)  · Yukawa (1949)  · Powell (1950)

De Broglie waves around a closed loop, such as would be associated with electrons circling nuclei in atoms, can persist only if the standing waves fit evenly around the loop; otherwise they cancel themselves out. This requirement causes the electrons in atoms to select only particular configurations, or states, among the many that would otherwise be available.

In space-time everything which for each of us constitutes the past, the present and the future is given en bloc...Each observer, as his time passes, discovers, so to speak, new slices of space-time which appear to him as successive aspects of the material world, though in reality the ensemble of events constituting space-time exist prior to his knowledge of them.

The 1925 pilot-wave model, [4] and the wave-like behaviour of particles discovered by de Broglie was used by Erwin Schrödinger in his formulation of wave mechanics . [5] 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 . [6]

This is the well-known de Broglie Hypothesis. Putting together Planck’s equations (quantization of energy: E = hν) and Einstein’s (special relativity: E = mc 2 ), de Broglie calculated what the length of these matter waves associated with each particle would be, depending on its velocity and mass. Thus, according to de Broglie, our whole world is quantum, not just light—a conclusion so bold that it was immediately rejected by many physicists, and ignored by others.

Louis de broglie dissertation

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Louis de Broglie - Biographical

Louis de Broglie | French physicist |

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louis de broglie dissertation
louis de broglie dissertation

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