![]() ![]() The experimental outcome was 0.165 nm via Bragg's law, which closely matched the predictions. Īccording to the de Broglie relation, electrons with kinetic energy of 54 eV have a wavelength of 0.167 nm. According to de Broglie, for all matter and for radiation alike, the energy E įor n = 1, θ = 50°, and for the spacing of the crystalline planes of nickel ( d = 0.091 nm) obtained from previous X-ray scattering experiments on crystalline nickel. In 1924 Louis de Broglie presented his thesis concerning the wave–particle duality theory, which proposed the idea that all matter displays the wave–particle duality of photons. However, this was challenged in Albert Einstein's 1905 paper on the photoelectric effect, which described light as discrete and localized quanta of energy (now called photons), which won him the Nobel Prize in Physics in 1921. It was an experimental milestone in the creation of quantum mechanics.Īccording to Maxwell's equations in the late 19th century, light was thought to consist of waves of electromagnetic fields and matter was thought to consist of localized particles. This confirmed the hypothesis, advanced by Louis de Broglie in 1924, of wave-particle duality, and also the wave mechanics approach of the Schrödinger equation. The Davisson–Germer experiment was a 1923-27 experiment by Clinton Davisson and Lester Germer at Western Electric (later Bell Labs), in which electrons, scattered by the surface of a crystal of nickel metal, displayed a diffraction pattern. ![]()
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