engineering physics MCQ #521

The frequency of the emitted radiation when an electron jumps from n = 4 to n = 2 is given by ΔE = h * ν. What is ν?

engineering physics MCQ #521

  1. Question 1

    Q1. The frequency of the emitted radiation when an electron jumps from n = 4 to n = 2 is given by ΔE = h * ν. What is ν?

    • A) 6.17 x 10¹⁴ Hz
    • B) 4.57 x 10¹⁴ Hz
    • C) 3.08 x 10¹⁴ Hz
    • D) 6.91 x 10¹⁴ Hz

    Answer: 6.17 x 10¹⁴ Hz

    Explanation: First, calculate ΔE = E4 - E2 = (-0.85) - (-3.4) = 2.55 eV = 2.55 * 1.6 x 10⁻¹⁹ J. Then, ν = ΔE / h = 6.17 x 10¹⁴ Hz.