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Two identical samples (same material and same amount) P and Q of a radioactive substance having mean life T are observed to have activities `R_(p) andR_(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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