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Two identical sample P and Q of radioactive substance having mean life T are observed to having are observed to have activities Ap and Aq respectively at the time of observation if P is older than Q then the difference in their ages is

Asked by sudheerkapoor67 15th October 2017, 9:21 PM
Answered by Expert
Answer:
Activity and time are related by fraction numerator d N over denominator d t end fraction space equals space minus lambda t 
 
Hence A subscript p space equals space minus lambda t subscript P

A subscript Q equals space minus lambda t subscript Q

t subscript P space end subscript space minus space t subscript Q space equals space fraction numerator A subscript Q minus A subscript P over denominator lambda end fraction space equals space fraction numerator A subscript Q minus A subscript P over denominator ln 2 end fraction space T subscript 1 divided by 2 end subscript
Answered by Expert 16th October 2017, 12:29 PM
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