Atoms and Nuclei

JEE Main 2019 · 10 Apr, Evening shift · Q6090

PhysicsMedium183×since 2002Q6090

Two radioactive substances A and B have decay constants 5

\lambda

and

\lambda

respectively. At t = 0, a sample has the same number of the two nuclei. The time taken for the ratio of the number of nuclei to become

{\left( {{1 \over e}} \right)^2}

will be :

JEE Main 2019 · 10 Apr, Evening shift · Q6090

PhysicsMedium183×since 2002Q6090

Two radioactive substances A and B have decay constants 5

\lambda

and

\lambda

respectively. At t = 0, a sample has the same number of the two nuclei. The time taken for the ratio of the number of nuclei to become

{\left( {{1 \over e}} \right)^2}

will be :

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