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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

`(1)/(T)((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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