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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 30 - Atoms > Two radioactive substances A and B have decay constants 5 λ and λ respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)^2 after a time interval

Two radioactive substances A and B have decay constants 5 λ and λ respectively. At t=0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be (1/e)^2 after a time interval

Radioactive material 'A' has decay constant '8λ' and material 'B' has decay constant 'λ'. Initially they have same number of nuclei. After what time the ratio of number of nuclei of material 'B' to that 'A' will be 1/e?