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The half-life of a radioactive substance is 2 seconds. Calculate the decay constant

Physics
WAEC 1991
The half-life of a radioactive substance is 2 seconds. Calculate the decay constant
  • A. 0.035s-1
  • B. 0.151s-1
  • C. 0.347s-1
  • D. 0.576s-1
  • E. 1.386s-1
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Correct Answer: Option C
Explanation
\(\lambda = \frac{0.693}{T_{\frac{1}{2}}} = \frac{0.693}{2}\)

= 0.347s-1
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