engineering physics MCQ #510

The wavelength of the second line of Balmer series is?

engineering physics MCQ #510

  1. Question 1

    Q1. The wavelength of the second line of Balmer series is?

    • A) 486 nm
    • B) 434 nm
    • C) 410 nm
    • D) 656 nm

    Answer: 434 nm

    Explanation: For Balmer series, n1 = 2. For the second line, n2 = 4. Use 1 / λ = R (1 / 2² - 1 / 4²) to find λ.