A radioactive isotope has a half life T years After how much time its ativity reduced to 6 25% - Physics - Nuclei

Question

A radioactive isotope has a half life T years After how much
time its ativity reduced to 6 25% of its original activity?

Shalini · Answer

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A radioactive isotope has a half life T years. After how much time its ativity reduced to 6.25% of its original activity?