Spectral Series of Hydrogen Atom : Lyman, Balmer, Paschen, Brackett & Pfund Series

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  • Опубликовано: 13 дек 2024
  • This animation shows the Spectral series of hydrogen atom. Whenever an electron in a hydrogen atom jumps from higher energy level to the lower energy level, the difference in energies of the two levels is emitted as a radiation of particular wavelength. It is called a spectral line. As the wavelength of the spectral line depends upon the two orbits of energy levels between which the transition of electron takes place, various spectral lines are obtained. The different wavelengths constitute spectral series which are the characteristic of the atoms emitting them. The following are the spectral series of hydrogen atom.
    (i) Lyman series
    When the electron jumps from any of the outer orbits to the first orbit, the spectral lines emitted are in the ultraviolet region of the spectrum and they are said to form a series called Lyman series
    (ii) Balmer series
    When the electron jumps from any of the outer orbits to the second orbit, we get a spectral series called the Balmer series. All the lines of this series in hydrogen have their wavelength in the visible region.
    (iii) Paschen series
    This series consists of all wavelengths which are emitted when the electron jumps from outer most orbits to the third orbit.
    (iv) Brackett series
    The series obtained by the transition of the electron from outer most orbits to the fourth orbit.
    (v) Pfund series
    The lines of the series are obtained when the electron jumps from
    outer most orbits to the fifth orbit. This series also lies in the infrared region.

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