MDCAT Physics MCQ #2581

An X-ray tube produces Kα radiation. What formula relates photon energy to atomic number?

MDCAT Physics MCQ #2581

  1. Question 1

    Q1. An X-ray tube produces Kα radiation. What formula relates photon energy to atomic number?

    • A) E = 13.6(Z - 1)² eV
    • B) E = 13.6Z²/2
    • C) E = 13.6Z²
    • D) E = 13.6(Z - 2)²

    Answer: E = 13.6(Z - 1)² eV

    Explanation: Moseley's law uses (Z - 1)² for Kα. Option D subtracts 2 instead.