Uncertainty Principle Using ΔEΔt ≥ ħ/2: the Lifetime of an Excited

question 18

Multiple Choice

Uncertainty principle using ΔEΔt ≥ ħ/2: The lifetime of an excited nuclear state is 1.0 ns. What is the minimum uncertainty in the energy of this state? (ħ = 1.055 × 10^-34 J ∙ s = 6.591 × 10^-16 eV ∙ s, 1 eV = 1.60 × 10^-19 J)

• A) 5.0 × 10^-10 eV
• B) 5.0 × 10^-26 eV
• C) 3.3 × 10^-25 eV
• D) 1.6 × 10^-7 eV
• E) 3.3 × 10^-7 eV

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