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Two identical samples (same material and...

Two identical samples (same material and same amout) `P and Q` of a radioactive substance having mean life `T` are observed to have activities `A_P` and `A_Q` respectively at the time of observation. If `P` is older than `Q`, then the difference in their age is

A

`T l n ((A_(p))/(A_(Q))`

B

`T l n ((A_(Q))/(A_(P))`

C

`I/T l n ((A_(P))/(A_(Q))`

D

`T((A_(P))/(A_(Q))`

Text Solution

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The correct Answer is:
B
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