there is no nucleus B. After sometime t
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 :
28
Nov
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. [...]