MDCAT Physics MCQ #2562

A proton and an electron have the same de Broglie wavelength. What is the ratio of their kinetic energies?

MDCAT Physics MCQ #2562

  1. Question 1

    Q1. A proton and an electron have the same de Broglie wavelength. What is the ratio of their kinetic energies?

    • A) 1:1
    • B) 1:1836
    • C) 1836:1
    • D) 1:2000

    Answer: 1836:1

    Explanation: KE ∝ 1/m, so proton's KE is 1836 times electron's KE for the same λ. Other options miscalculate or ignore mass ratio.