engineering physics MCQ #476

The frequency of the spectral line emitted when an electron jumps from n = 4 to n = 3 is given by f = ΔE / h.

engineering physics MCQ #476

  1. Question 1

    Q1. The frequency of the spectral line emitted when an electron jumps from n = 4 to n = 3 is given by f = ΔE / h.

    • A) 1.59 × 10¹⁴ Hz
    • B) 2.46 × 10¹⁴ Hz
    • C) 3.29 × 10¹⁴ Hz
    • D) 4.57 × 10¹⁴ Hz

    Answer: 1.59 × 10¹⁴ Hz

    Explanation: Calculate ΔE = E4 - E3, then convert to Joules and divide by h to get f = 1.59 × 10¹⁴ Hz.