The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to ${\left(\frac{1}{16}\right)}^{\mathrm{th}}$ of its initial value?

[NEET 2023]

Question

The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to ${\left(\frac{1}{16}\right)}^{\mathrm{th}}$ of its initial value? [NEET 2023]

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The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to \({\left(\f…

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