If the rate constant for the disintegration of a radioactive nucleus is λ. Therefore the probability, P of survival of a radioactive nucleus for one mean life is
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a
e
b
e2
c
e−1
d
e−2
answer is C.
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Detailed Solution
Probability for survival=NN0=e−λtNow mean life period =1λ∴ probability =e−λ×1λ=e−1