Two radioactive substances A and B have decay constants and 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 after a time interval
(d) Number of nuclei remained after time t can be wriiten as
where, is initial number of nuclei of both the substances.
Dividing Eq. (i) by Eq. (ii), we obtain
But, we have given
Comparing the powers, we get