engineering physics MCQ #449

The frequency of the radiation emitted when an electron jumps from n = 2 to n = 1 is given by ΔE = hf. The value of f is

engineering physics MCQ #449

  1. Question 1

    Q1. The frequency of the radiation emitted when an electron jumps from n = 2 to n = 1 is given by ΔE = hf. The value of f is

    • A) 2.46 * 10^15 Hz
    • B) 1.89 * 10^15 Hz
    • C) 3.29 * 10^15 Hz
    • D) 2.92 * 10^15 Hz

    Answer: 2.46 * 10^15 Hz

    Explanation: ΔE = 10.2 eV, f = ΔE / h = 10.2 * 1.6 * 10^-19 / (6.626 * 10^-34) = 2.46 * 10^15 Hz.