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JEE Advanced 2023 Paper 2 Solutions

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Question : 12

Total: 52

In a radioactive decay process, the activity is defined as A=−‌

, where N(t) is the number of radioactive nuclei at time (t). Two radioactive sources, S1 and S2 have same activity at time t=0. At a later time, the activities of S1 and S2 are A1 and A2, respectively. When S1 and S2 have just completed their 3‌rd ‌ and 7‌th ‌ half-lives, respectively, the ratio ‌

is ______________.

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