Physics - Modern Physics Question with Solution | TestHub

The value of initial sample is 8000. It decays in 4 days to half of the initial value i.e. 4000 atoms. In next four days, it further days to 2000 atoms. In next four days, it will again decay to 1000 atom i.e. half of the present initial value.

Hence,



So, half-life of sample$\left(T_{\frac{1}{2}}\right)=4$days