Suppose that the initial activity No and lifetime of a radi
Suppose that the initial activity (No) and lifetime (?) of a
radioactive source are each known with a relative uncertainty of 1%. If one calculates
the activity (N) at time t from the relation
N = No e
Solution
There is no way to determine this..it is a judgemental question ..its upto you considering the time and time constant to chose uncertainity...within the range in which time constant =t uncertainities will be comparable