Activity of a radioactive sample decreases to 
of its original value in 3 days. Then, in 9 days its activity will become
A
of the original value
B
(1/9) of the original value
C
of the original value
D
of the original value.
Text Solution
Verified by ExpertsThe correct answer is:
B
Just as the time required for the activity to be reduced to half the original value is called half-life, to be reduced to 
of the original activity can be called 
life.
There is 2 one third life, the activity will be reduced to 
.
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