engineering physics MCQ #547

The energy of the photon emitted when an electron jumps from n = 5 to n = 2 is

engineering physics MCQ #547

  1. Question 1

    Q1. The energy of the photon emitted when an electron jumps from n = 5 to n = 2 is

    • A) 2.86 eV
    • B) 4.09 eV
    • C) 3.02 eV
    • D) 2.55 eV

    Answer: 2.86 eV

    Explanation: ΔE = E5 - E2 = (-0.544) - (-3.4) = 2.856 eV, using En = -13.6 / n² eV.