The radiation is emitted when a hydrogen atom goes from a high energy state to a lower energy state. The wavelength of one line in the visible region of the atomic spectrum of hydrogen is $6.5 \times 10^{-7} \, m$. The energy difference between the two states is:

  • A
    $3.0 \times 10^{-19} \, J$
  • B
    $1.0 \times 10^{-18} \, J$
  • C
    $5.0 \times 10^{-10} \, J$
  • D
    $6.5 \times 10^{-7} \, J$

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