engineering physics MCQ #370

The energy difference between the two levels involved in the emission of a spectral line of wavelength 589 nm is

engineering physics MCQ #370

  1. Question 1

    Q1. The energy difference between the two levels involved in the emission of a spectral line of wavelength 589 nm is

    • A) 2.1 eV
    • B) 1.9 eV
    • C) 2.3 eV
    • D) 1.7 eV

    Answer: 2.1 eV

    Explanation: Using E = hc/λ, energy difference is calculated as 2.1 eV.