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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 14 - Nuclear Physics and Radioactivity > The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is

The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is

The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is