engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Physics Nuclear Physics Radioactivity
Two radioactive substances X and Y originally have N1 and N2 nuclei respectively. Half-life of X is half of the half-life of Y. After three half-lives of Y, numbers of nuclei of both are equal. The ratio N1/N2 will be equal to:
1
8/1
2
1/8
3
3/1
4
1/3