Unformatted text preview: and the nucleus. 2. But, instead of the infinity of orbits which would be possible in classical mechanics, it is only possible for an electron to move in an orbit for which its orbital angular momentum, L , is an integral multiple of Planck’s constant, h , divided by 2 π . 3. Despite the fact that it is constantly accelerating, an electron moving in such an allowed orbit does not radiate electromagnetic energy. Thus, its total energy E remains constant. 4. Electromagnetic radiation is emitted if an electron, initially moving in an orbit of total energy, E i , discontinuously changes its motion so that it moves in an orbit of total energy, E f . The frequency of the emitted radiation f is equal to the change in energy (E i –E f ) divided by Planck’s constant h . r v electron charge = e proton charge = +e F r Elecromagnetic Radiation proton charge = +e...
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 Spring '07
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 Physics, Atom, Electron, Proton, Circular Motion, Photon, Fundamental physics concepts

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