engineering physics MCQ #381

The wavelength of the radiation emitted when an electron jumps from n = 2 to n = 1 is?

engineering physics MCQ #381

  1. Question 1

    Q1. The wavelength of the radiation emitted when an electron jumps from n = 2 to n = 1 is?

    • A) 121 nm
    • B) 102 nm
    • C) 656 nm
    • D) 486 nm

    Answer: 121 nm

    Explanation: Using 1 / λ = R * (1 / 1² - 1 / 2²) gives λ = 121 nm.