In a sample of a radioactive substance what fraction of the initial number of nuclei will remain undecayed after time t=T2, T , where T = half-life of radioactive substance
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a
12
b
122
c
14
d
12−1
answer is A.
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Detailed Solution
We have, N=N012nWhere n is no. of half lives i.e.,12Hence N=N02 or NN0=12