The half life of a radioactive substances is 20 minutes. The approximate time interval (t2-t1) between the time t2 , When 2/3 of it has decayed and time t1 and 1/3 of it had decayed is

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

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

Half life of a radio-active substance is 20 minutes. The time between 20 % and 80 % decay will be

The half life of a substance is 20 minutes. E The time interval between 33% decay and 67% decay.

The half life of radioactive element is 20 min . The time interval between the stages of its 33% and 67% decay is

The half-life of a radioactive substance is 30 minutes, The time (in minutes) taken between 40 % decay and 85 % decay of the same radioactive substance is.

The half life of radioactive substance is T. Then the fraction of the substance that has decayed in time t is-

Half-life of a radioactive substance is 20 minutes. Difference between points of time when it is 33 % disintegrated and 67 % disintegrated is approximate.

The half life of a radioactive substance is 20s, the time taken for the sample to decay by 7//8^(th) of its initial value is

Half-life of a radioactive substance is T. At time t_1 activity of a radioactive substance is R_1 and at time t_2 it is R_2 . Find the number of nuclei decayed in this interval of time.