In the above figure,$D$ and $E$ respectively represent:

  • A
    Absorption line of Balmer series and the ionization potential of hydrogen
  • B
    Absorption line of Balmer series and the wavelength lesser than lowest of the Lyman series
  • C
    Spectral line of Balmer series and the maximum wavelength of Lyman series
  • D
    Spectral line of Lyman series and the absorption of greater wavelength of limiting value of Paschen series

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