In the Bohr model of the atom,when an electron undergoes a transition from $n = 1$ to $n = 3$,the energy absorbed or emitted is ........

  • A
    $2.15 \times 10^{-11} \ erg$
  • B
    $0.1911 \times 10^{-10} \ erg$
  • C
    $2.389 \times 10^{-12} \ erg$
  • D
    $0.239 \times 10^{-10} \ erg$

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