Heisenberg uncertainty principle:
AΔx = Δp
BAlways zero
CΔx × Δp = exact
DΔx × Δp >= h / (4π) (or ħ/2)
Answer & Solution
Correct answer: D. Δx × Δp >= h / (4π) (or ħ/2)
Δx Δp ≥ ħ/2. Cannot simultaneously know exact position and momentum. Fundamental limit, not measurement-error issue. Cornerstone of quantum mechanics.
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