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  2. Hydrogen spectral series - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_spectral_series

    The spectral series of hydrogen, on a logarithmic scale. The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed spectral lines are due to the electron making transitions between two energy levels in an atom.

  3. Balmer series - Wikipedia

    en.wikipedia.org/wiki/Balmer_series

    The Balmer series, or Balmer lines in atomic physics, is one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer formula, an empirical equation discovered by Johann Balmer in 1885.

  4. Electromagnetic absorption by water - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_absorption...

    The HITRAN spectroscopy database lists more than 37,000 spectral lines for gaseous H 2 16 O, ranging from the microwave region to the visible spectrum. [5] [12] In liquid water the rotational transitions are effectively quenched, but absorption bands are affected by hydrogen bonding.

  5. Rydberg formula - Wikipedia

    en.wikipedia.org/wiki/Rydberg_formula

    Rydberg's formula as it appears in a November 1888 record. In atomic physics, the Rydberg formula calculates the wavelengths of a spectral line in many chemical elements.The formula was primarily presented as a generalization of the Balmer series for all atomic electron transitions of hydrogen.

  6. Spectral line - Wikipedia

    en.wikipedia.org/wiki/Spectral_line

    A spectral line is a weaker or ... Many spectral lines of atomic hydrogen also have ... and the patterns for all atoms are well-predicted by the Rydberg-Ritz formula ...

  7. Rydberg–Ritz combination principle - Wikipedia

    en.wikipedia.org/wiki/Rydberg–Ritz_combination...

    The spectral lines of hydrogen had been analyzed and found to have a mathematical relationship in the Balmer series. This was later extended to a general formula called the Rydberg formula . This could only be applied to hydrogen-like atoms.

  8. Hydrogen line - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_line

    A hydrogen atom with proton and electron spins aligned (top) undergoes a flip of the electron spin, resulting in emission of a photon with a 21 cm wavelength (bottom) The hydrogen line, 21 centimeter line, or H I line [a] is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms.

  9. Hydrogen - Wikipedia

    en.wikipedia.org/wiki/Hydrogen

    Spectral lines of hydrogen: ... is a gas of diatomic molecules with the formula H 2, ... Inputs and outputs of the electrolysis of water production of hydrogen.