Practice question
Question
A neutron has a kinetic energy of 1.67 × 10⁻¹⁸ J. What is its de Broglie wavelength? (h = 6.626 × 10⁻³⁴ J s, mₙ = 1.67 × 10⁻²⁷ kg)
Explanation
v = √(2KE/m). λ = h/(mv) ≈ 2.805×10⁻¹² m.
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