engineering physics MCQ #430

The wavelength of the radiation emitted when an electron falls from n = 5 to n = 2 is

engineering physics MCQ #430

  1. Question 1

    Q1. The wavelength of the radiation emitted when an electron falls from n = 5 to n = 2 is

    • A) 4341 Å
    • B) 4102 Å
    • C) 3970 Å
    • D) 3835 Å

    Answer: 4341 Å

    Explanation: 1/λ = R(1/2² - 1/5²), giving λ = 4341 Å.