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The activity of a sample of radioactive ...

The activity of a sample of radioactive material is `R_(1)` at time `t_(1)andR_(2)"at time"t_(2)(t_(2)gtt_(1))`. Its mean life is T. Then,

A

`A_(1)t_(1)=A_(2)t_(2)`

B

`A_(1)-A_(2)=t_(2)-t_(1)`

C

`A_(2)=A_(1)e^((t_(1)-t_(2)))//T)`

D

`A_(2)=A_(1)e^((t_(1)//t_(2)))//T)`

Text Solution

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The correct Answer is:
C
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