The half life of a radioactive nucleus is 50 days. The time interval (t2 - t1) between the time t2 when of it has decayed and the time t1 when of it had decayed is :
50 days
60 days
15 days
30 days
As discussed in @8784
After t2 time, only remains.
- 1
After t1 time, only remains
-2
Divide equation 2 in equation 1, we get:
on taking log.
or ln2 =
or
Option 1)
50 days
This answer is correct
Option 2)
60 days
This answer is incorrect
Option 3)
15 days
This answer is incorrect
Option 4)
30 days
This answer is incorrect