engineering chemistry MCQ #975

The wavelength of a photon emitted when an electron jumps from n = 3 to n = 1 is

engineering chemistry MCQ #975

  1. Question 1

    Q1. The wavelength of a photon emitted when an electron jumps from n = 3 to n = 1 is

    • A) 102.6 nm
    • B) 121.6 nm
    • C) 656.3 nm
    • D) 434.1 nm

    Answer: 102.6 nm

    Explanation: Using 1/λ = Rc (1/1² - 1/3²) = Rc (8/9), we get λ = 102.6 nm.