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Two radioactive materials X1 and X2 have decay constants 6λ and 3λ respectively.

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Two radioactive materials X1 and X2 have decay constants 6λ and 3λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X1 to that of X2 will be 1/e after a time

(a) 1/6λ

(b) 1/3λ

(c) 3/6λ

(d) 6/9λ

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1 Answer

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Best answer

The correct option is (b) 1/3λ.

Explanation:

The ratio of number of nuclei of X1 to that of X2 after time t,

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