engineering physics MCQ #384

The frequency of the radiation emitted when an electron falls from n = 3 to n = 2 in hydrogen atom is

engineering physics MCQ #384

  1. Question 1

    Q1. The frequency of the radiation emitted when an electron falls from n = 3 to n = 2 in hydrogen atom is

    • A) 4.57 x 10¹⁴ Hz
    • B) 3.29 x 10¹⁵ Hz
    • C) 2.46 x 10¹⁴ Hz
    • D) 1.89 x 10¹⁵ Hz

    Answer: 4.57 x 10¹⁴ Hz

    Explanation: Using ΔE = hf and En = -13.6 / n² eV, ΔE = 1.89 eV, f = ΔE / h = 4.57 x 10¹⁴ Hz.