The radioactive sources A and B of half of 2hr and 4hr

Last updated: 6/11/2023

The radioactive sources A and B of half of 2hr and 4hr respectively initially conta same number of radioactive atoms At th of 2 hours their rates of disintegration the ratio 1 4 1 Electrons 2 2 1 3 2 1 4 used in an electron microscop