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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 18 - Atoms and Nuclei > A radioactive nucleus A with a half-life T, decays into a nucleus B. At t=0, there is no nucleus B. After sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :

A radioactive nucleus A with a half-life T, decays into a nucleus B. At t=0, there is no nucleus B. After sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :

A radioactive nucleus A with a half-life T decays into a nucleus B. At t=0 t is given by the ratio of the number of B to that of A is 0.3. Then there is no nucleus B. After sometime t