Answer to Question #295 in Quantum Mechanics for leo
Freely moving non-relativistic particle has a relative uncertainty of the kinetic energy of about 1.6 ∙ 10^(-4). Estimate how much the coordinate uncertainty of such particle is bigger than its de Broglie wavelength.
Δx/λ ≈ 1/√((πΔT)/T) = 2 * 10³
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