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  2. Bohr model - Wikipedia

    en.wikipedia.org/wiki/Bohr_model

    The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell model. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory .

  3. Hydrogen spectral series - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_spectral_series

    The Bohr model was later replaced by quantum mechanics in which the electron occupies an atomic orbital rather than an orbit, but the allowed energy levels of the hydrogen atom remained the same as in the earlier theory. Spectral emission occurs when an electron transitions, or jumps, from a higher energy state to a lower energy state.

  4. Bohr–Sommerfeld model - Wikipedia

    en.wikipedia.org/wiki/Bohr–Sommerfeld_model

    In 1913, Niels Bohr displayed rudiments of the later defined correspondence principle and used it to formulate a model of the hydrogen atom which explained its line spectrum. In the next few years Arnold Sommerfeld extended the quantum rule to arbitrary integrable systems making use of the principle of adiabatic invariance of the quantum ...

  5. Hydrogen-alpha - Wikipedia

    en.wikipedia.org/wiki/Hydrogen-alpha

    In the Bohr model of the hydrogen atom, the electron transition from energy level = to = results in the emission of an H-alpha photon. Hydrogen-alpha, typically shortened to H-alpha or Hα, is a deep-red visible spectral line of the hydrogen atom with a wavelength of 656.28 nm in air and 656.46 nm in vacuum. It is the first spectral line in the ...

  6. Rydberg constant - Wikipedia

    en.wikipedia.org/wiki/Rydberg_constant

    The Bohr model explains the atomic spectrum of hydrogen (see Hydrogen spectral series) as well as various other atoms and ions. It is not perfectly accurate, but is a remarkably good approximation in many cases, and historically played an important role in the development of quantum mechanics. The Bohr model posits that electrons revolve around ...

  7. File:Emission spectrum-H labeled.svg - Wikipedia

    en.wikipedia.org/wiki/File:Emission_spectrum-H...

    Source: File:Emission spectrum-H.png Created using the Balmer formula: = = Where is the wavelength. B is a constant with the value of 3.6456×10-7 m or 364.56 nm. n is equal to 2

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  9. Quantum dot - Wikipedia

    en.wikipedia.org/wiki/Quantum_dot

    where a B = 0.053 nm is the Bohr radius, m is the mass, μ is the reduced mass, and ε r is the size-dependent dielectric constant (relative permittivity). This results in the increase in the total emission energy (the sum of the energy levels in the smaller band gaps in the strong confinement regime is larger than the energy levels in the band ...