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Two radioactive material A and B have decay constants 10 lambda and lambda, respectively. If initially they have a the same number of nuclei, then the ratio of the number of nuclei of A to that of B will be 1//e after a time 1/(n lambda), where n is ___________ |
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Answer» `N_(B) = N_(0)e^(-lambda t)` To find t when `N_(A)/N_(B) = 1/e` `rArr e^(-10 lambdat)/(e^(-lambda t)) = 1/e rArr e^(-9 lambda t)= e^(-1) rArr 9lambda t =1 rArr t=1/(9 lambda)` |
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