PDF-hypothesis of Louis de Broglie (1924): particles may have wave-like pr

De Broglie Waves The is the complex valued function describing the matter waveThe of finding a particle with wave function at coordinate at time is proportional to Max Born 1926 The to. Theory Louis de Broglie originated the idea that moving electrons may exhibit both particle and wave nature He proposed that analogous to photons the wavelength of the electron is given by mv where is Plancks constant and mv is the nonrelativisti gondranpolytechniqueorg Ecole Nationale de lAviation Civile 31000 Toulouse France email alexandregondranetuumpcfr ABSTRACT We introduce into classical mechanics the concept of non discerned particles for particles that are identical noninteracting an “The most incomprehensible thing about the world is that it is comprehensible.”. – . Albert Einstein. Day. 18, 3/31:. . Questions? . Electron Diffraction. Wave packets and uncertainty. Next Week:. Wave-particle duality. (c) So Hirata, Department of Chemistry, University of Illinois at Urbana-Champaign. . This material has . been developed and made available online by work supported jointly by University of Illinois, the National Science Foundation under Grant CHE-1118616 (CAREER), and the Camille & Henry Dreyfus Foundation, Inc. through the Camille Dreyfus Teacher-Scholar program. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the sponsoring agencies. By: . Harleen. . Kaur. Lecturer in Physics. P.G.G.C.G.. Sector-11, Chandigarh.. If light, which we thought of as a wave, behaves as a particle, then maybe things we think of as particles behave as waves…. photo from http://www.aip.org/history/heisenberg/p08.htm. Energy/Frequency and Momentum/Wavelength Relations for a Photon . a short study of high school level understanding . By: Layla Quinones. New York University Department of Teaching and Learning. Background Information. Studies have shown that college students have difficulty describing wave phenomena due to misconceptions. Adapted . from . org . key - quantum ib2 . 08.doc . by . IanLindley . http. ://sris-physics.wikispaces.com/. The “Electron-in-a-Box” Model of the Atom. How can the atomic energy levels be explained as quantized matter waves?. . M. Sc Physics, 3. rd. Semester. . Dr. . Arvind. Kumar . Physics Department. NIT . Jalandhar. e.mail. : . iitd.arvind@gmail.com. https://sites.google.com/site/karvindk2013/. Contents of Course:. A Physics MOSAIC. MIT Haystack Observatory RET. Revised 2011. Background Image from Wikipedia, Roger . McLassus. , Creative Commons . Reflection. When a wave encounters a boundary, it will be. at least partially reflected off this boundary.. Waves transfer energy!. A wave does not carry matter . It only moves matter as it travels through it.. Waves. Compression (longitudinal) waves . are waves in which the particles of the medium move in a direction . Ex. In the ocean, waves travel across but the water only oscillates up and down returning to their original position. . Pulse - a single wave from a disturbance. Ex. Throwing a rock in water (a pulse travels in all directions from the point of contact). amplitude, frequency, wavelength, speed, phase, phase difference, . c . = . f . λ. . f . = . 1/. T . Phase difference may be measured as angles (radians and degrees) or as fractions of a cycle. . . Looking back, it may seem odd that two decades passed between the 1905. discovery of the particle properties of waves and the 1924 speculation that particles might show wave behavior. It is one thing, however, to suggest a revolutionary concept to explain otherwise mysterious data and quite another to suggest an equally revolutionary concept without a strong experimental mandate. The latter is just what Louis de Broglie did in 1924 when he proposed that moving objects have wave as well as particle characteristics. So different was the scientific climate at the time from that around the turn of the century that de Broglie’s ideas soon received respectful attention, whereas the earlier quantum theory of light of Planck and Einstein had been largely ignored despite its striking empirical support. The existence of de Broglie waves was experimentally demonstrated by 1927, and the duality principle they represent provided the starting point for Schrödinger’s successful development of quantum mechanics in the previous year.