engineering physics MCQ #495

The wavelength of the first line of the Paschen series is

engineering physics MCQ #495

  1. Question 1

    Q1. The wavelength of the first line of the Paschen series is

    • A) 820 nm
    • B) 1094 nm
    • C) 1282 nm
    • D) 1875 nm

    Answer: 1875 nm

    Explanation: Using the Rydberg formula: 1/λ = R (1/3² - 1/4²), λ = 1875 nm.