engineering physics MCQ #342

The wavelength of a spectral line in the Lyman series is given by 1 / λ = R * (1 / 1² - 1 / n²). For n = 2, what is 1 / λ?

engineering physics MCQ #342

  1. Question 1

    Q1. The wavelength of a spectral line in the Lyman series is given by 1 / λ = R * (1 / 1² - 1 / n²). For n = 2, what is 1 / λ?

    • A) 3R / 4
    • B) R / 4
    • C) 5R / 4
    • D) 3R / 2

    Answer: 3R / 4

    Explanation: Substituting n = 2 in the formula, 1 / λ = R * (1 - 1 / 4) = 3R / 4.