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  2. Simplified perturbations models - Wikipedia

    https://en.wikipedia.org/wiki/Simplified_perturbations...

    [1] [4] Current code libraries [5] [6] use SGP4 and SDP4 algorithms merged into a single codebase in 1990 [7] handling the range of orbital periods which are usually referred to generically as SGP4. [7]

  3. Bohr–Sommerfeld model - Wikipedia

    https://en.wikipedia.org/wiki/Bohr–Sommerfeld_model

    Orbitals of the Radium. (End plates to [1]) 5 electrons with the same principal and auxiliary quantum numbers, orbiting in sync. ([2] page 364) The Sommerfeld extensions of the 1913 solar system Bohr model of the hydrogen atom showing the addition of elliptical orbits to explain spectral fine structure.

  4. Electromagnetic four-potential - Wikipedia

    https://en.wikipedia.org/wiki/Electromagnetic_four-potential

    An electromagnetic four-potential is a relativistic vector function from which the electromagnetic field can be derived. It combines both an electric scalar potential and a magnetic vector potential into a single four-vector.

  5. Aharonov–Bohm effect - Wikipedia

    https://en.wikipedia.org/wiki/Aharonov–Bohm_effect

    It is generally argued that the Aharonov–Bohm effect illustrates the physicality of electromagnetic potentials, Φ and A, in quantum mechanics.Classically it was possible to argue that only the electromagnetic fields are physical, while the electromagnetic potentials are purely mathematical constructs, that due to gauge freedom are not even unique for a given electromagnetic field.

  6. Orbital motion (quantum) - Wikipedia

    https://en.wikipedia.org/wiki/Orbital_motion_(quantum)

    Quantum orbital motion involves the quantum mechanical motion of rigid particles (such as electrons) about some other mass, or about themselves.In classical mechanics, an object's orbital motion is characterized by its orbital angular momentum (the angular momentum about the axis of rotation) and spin angular momentum, which is the object's angular momentum about its own center of mass.

  7. Atomic orbital - Wikipedia

    https://en.wikipedia.org/wiki/Atomic_orbital

    Orbitals for ℓ > 3 continue alphabetically (g, h, i, k, ...), [3] omitting j [4] [5] because some languages do not distinguish between letters "i" and "j". [ 6 ] Atomic orbitals are basic building blocks of the atomic orbital model (or electron cloud or wave mechanics model), a modern framework for visualizing submicroscopic behavior of ...

  8. Quantum number - Wikipedia

    https://en.wikipedia.org/wiki/Quantum_number

    In the era of the old quantum theory, starting from Max Planck's proposal of quanta in his model of blackbody radiation (1900) and Albert Einstein's adaptation of the concept to explain the photoelectric effect (1905), and until Erwin Schrödinger published his eigenfunction equation in 1926, [1] the concept behind quantum numbers developed based on atomic spectroscopy and theories from ...

  9. Electron optics - Wikipedia

    https://en.wikipedia.org/wiki/Electron_optics

    Magnetic lens. Electron optics is a mathematical framework for the calculation of electron trajectories in the presence of electromagnetic fields.The term optics is used because magnetic and electrostatic lenses act upon a charged particle beam similarly to optical lenses upon a light beam.