JEE Main 202227 Jul, Evening shiftPhysicsEasyAtoms and Nuclei183× since 2002The activity of a radioactive material is 6.4×10−46.4 \times 10^{-4}6.4×10−4 curie. Its half life is 5 days. The activity will become 5×10−65 \times 10^{-6}5×10−6 curie after :AOption A. 7 daysBOption B. 15 daysCOption C. 25 daysDOption D. 35 daysCheckSkip · show solution
