engineering physics MCQ #417

The wavelength of the second line of the Balmer series is given by 1 / λ = R * (1 / 2² - 1 / 4²). The value of λ is

engineering physics MCQ #417

  1. Question 1

    Q1. The wavelength of the second line of the Balmer series is given by 1 / λ = R * (1 / 2² - 1 / 4²). The value of λ is

    • A) 486.1 nm
    • B) 434.1 nm
    • C) 410.2 nm
    • D) 656.3 nm

    Answer: 486.1 nm

    Explanation: 1 / λ = R * (1/4 - 1/16) = 3R/16, λ = 16 / (3R) = 486.1 nm.