engineering physics MCQ #426

The wavelength of the radiation emitted when an electron falls from n = 4 to n = 1 is

engineering physics MCQ #426

  1. Question 1

    Q1. The wavelength of the radiation emitted when an electron falls from n = 4 to n = 1 is

    • A) 1216 Å
    • B) 1026 Å
    • C) 972 Å
    • D) 950 Å

    Answer: 972 Å

    Explanation: 1/λ = R(1/1² - 1/4²), giving λ = 972 Å.