Two radioactive substances A and B have decay constants 5 and respectively. At t=0, a sample has the same number of the two nuclei. The time taken for the ratio of the number of nuclei to become will be : |
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(a) |
(b) |
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(c) |
(d) |

Two radioactive substances A and B have decay constants 5 and respectively. At t=0, a sample has the same number of the two nuclei. The time taken for the ratio of the number of nuclei to become will be : |
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(a) |
(b) |
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(c) |
(d) |

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