The half life of a radioactive nucleus i...

The half life of a radioactive nucleus is 50 days. The time interval `(t_(2)-t_(1))` between the time `t_(2)` when `(2)/(3)` of it has decayed and the time `t_(1)` when `(1)/(3)` of it had decayed is-

30 days

50 days

60 days

15 days

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