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Question

The decay constant of radioactive sample is λ. The half-life and mean-life of the sample are, respectively, given by
  1. 1/λ and (ln2)/λ
  2. (ln2)/λ and 1/λ
  3. λ/(ln2) and 1/λ
  4. λ(ln2) and 1/λ

A
λ(ln2) and 1/λ
B
(ln2)/λ and 1/λ
C
λ/(ln2) and 1/λ
D
1/λ and (ln2)/λ
Solution
Verified by Toppr

We know that, N=N0eλt
eλt=N0Nλt=ln(N0N)

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