engineering chemistry MCQ #992

The frequency of a spectral line is given by ν = Rc(1 / n₁² - 1 / n₂²). What is the frequency of the second line of the Lyman series?

engineering chemistry MCQ #992

  1. Question 1

    Q1. The frequency of a spectral line is given by ν = Rc(1 / n₁² - 1 / n₂²). What is the frequency of the second line of the Lyman series?

    • A) 2.47 × 10¹⁵ Hz
    • B) 3.08 × 10¹⁵ Hz
    • C) 2.92 × 10¹⁵ Hz
    • D) 3.29 × 10¹⁵ Hz

    Answer: 2.92 × 10¹⁵ Hz

    Explanation: For the second line of the Lyman series, n₁ = 1, n₂ = 3. Using ν = Rc(1 / 1² - 1 / 3²), we get ν = 2.92 × 10¹⁵ Hz.