Practice question
Question
An alpha particle and a proton have the same kinetic energy. What is the ratio of their de Broglie wavelengths? (mₚ = 1.67 × 10⁻²⁷ kg, m_α = 6.64 × 10⁻²⁷ kg)
Explanation
λ_α/λₚ = √(mₚ/m_α) ≈ 0.501.
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