Practice question
Question
An electron and a proton have the same de Broglie wavelength. What is the ratio of their kinetic energies? (mₚ = 1.67 × 10⁻²⁷ kg, mₑ = 9.1 × 10⁻³¹ kg)
Explanation
KEₑ/KEₚ = mₚ/mₑ ≈ 1836.
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