Two radioactive materials Y_1 \and Y_2 initially contain same number of nuclei. Their decay constants are 9 \lambda \s^{-1} and 6 \lambda \s^{-1} respectively. The time after which the ratio of number of undecayed nuclei of Y_1 \and Y_2 becomes 1/e is

AP EAMCET Engineering 24 Apr 2017 Shift 1 Paper

Section: Physics

Question : 118 of 160

Marks: +1, -0

Two radioactive materials Y1‌and‌Y2 initially contain same number of nuclei. Their decay constants are 9λs−1and6λs−1 respectively. The time after which the ratio of number of undecayed nuclei of Y1‌and‌Y2 becomes

1
3λ
s
1
15λ
s
1
10λ
s
1
8λ
s

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