engineering physics MCQ #455

The ratio of the energies of the first and second excited states of hydrogen atom is

engineering physics MCQ #455

  1. Question 1

    Q1. The ratio of the energies of the first and second excited states of hydrogen atom is

    • A) 4 / 9
    • B) 9 / 4
    • C) 1 / 4
    • D) 4 / 1

    Answer: 4 / 9

    Explanation: E2 = -13.6 / 2² = -3.4 eV, E3 = -1.51 eV. Ratio = E3 / E2 = (-1.51) / (-3.4) = 4/9.