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Two radioactive materials X_1 and X_2 have decay constants 10lambda and lambdarespectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X_1 to that of X_2 will be 1/e after atime |
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Answer» `1/(10lambda)` `therefore (N_0e^(-10lambdat))/(N_0e^(-lambdat))=1/e` or `1/e^(9 lambdat)=1/e` or `9lambdat=1` or `t=1/(9lambda)` |
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