Practice question
Question
An electron and a neutron have the same kinetic energy. What is the ratio of their de Broglie wavelengths? (mₑ = 9.1 × 10⁻³¹ kg, mₙ = 1.67 × 10⁻²⁷ kg)
Explanation
λₑ/λₙ = √(mₙ/mₑ) ≈ 42.8.
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