engineering physics MCQ #580

The wavelength of the Hα line in the hydrogen spectrum is 656 nm. What is the energy of the corresponding photon?

engineering physics MCQ #580

  1. Question 1

    Q1. The wavelength of the Hα line in the hydrogen spectrum is 656 nm. What is the energy of the corresponding photon?

    • A) 1.89 eV
    • B) 2.55 eV
    • C) 3.4 eV
    • D) 1.51 eV

    Answer: 1.89 eV

    Explanation: Use E = hc / λ, where λ = 656 nm, to find E = 1.89 eV.