engineering physics MCQ #344

The frequency of radiation emitted when an electron jumps from n = 3 to n = 2 is given by ΔE = hν. What is ν?

engineering physics MCQ #344

  1. Question 1

    Q1. The frequency of radiation emitted when an electron jumps from n = 3 to n = 2 is given by ΔE = hν. What is ν?

    • A) 4.57 * 10¹⁴ Hz
    • B) 3.29 * 10¹⁵ Hz
    • C) 1.89 * 10¹⁵ Hz
    • D) 2.57 * 10¹⁴ Hz

    Answer: 4.57 * 10¹⁴ Hz

    Explanation: ΔE = E3 - E2 = -1.51 - (-3.4) = 1.89 eV. ν = ΔE / h = 1.89 * 1.6 * 10⁻¹⁹ / (6.63 * 10⁻³⁴) = 4.57 * 10¹⁴ Hz.