Radioactive material A has decay constant 8 and material B has decay constant Initially, they have same number of nuclei. After what time, the ratio of number of nuclei of material B to that A will be ?
(b) Let initial number of nuclei in A and B is
Number of nuclei of A after time t is
Similarly, number of nuclei of A after time t is
It is given that
Now,from Eqs.(i) and (ii)