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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If the potential energy of a hydrogen atom in the first excited state is assumed to be zero,then the total energy of the $n = \infty$ state is,

The ratio of energies of photons produced due to the transition of an electron in a hydrogen atom from its $(i)$ second to first energy level and (ii) highest energy level to second energy level is: (in $3:1$)

$A$ stationary hydrogen atom has an electron that transitions from the fifth energy level to the ground level. The velocity that the atom acquires as a result of photon emission will be: ($m$ is the mass of the atom,$R$ is Rydberg constant,and $h$ is Planck's constant).

The minimum energy required by a hydrogen atom in the ground state to emit radiation in the Balmer series is nearly: (in $eV$)

An electron with kinetic energy $E$ collides with a hydrogen atom in the ground state. The collision will be elastic

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