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Question: Answered & Verified by Expert
The half life period of Radium is 3 minute. Its mean life time is
PhysicsNuclear PhysicsVITEEEVITEEE 2006
Options:
  • A $1.5$ minute
  • B $\frac{3}{0.6931}$ minute
  • C 6 minute
  • D $(3 \times 0.6931)$ minute
Solution:
2012 Upvotes Verified Answer
The correct answer is: $\frac{3}{0.6931}$ minute
Mean life time $\tau=1.44 \mathrm{~T}$ where $\mathrm{T}$ is half life period of an atom
$\therefore \tau=1.44 \mathrm{~T}=\frac{\mathrm{T}}{0.6931}=\frac{3}{0.6931}$ minute

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