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InterviewSolution
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Determine the age of ancient wooden item if it is known that the specific activity of C^(14) nuclide in them amounts to 3//5 of that in lately felled trees. The hlaf-life of c^(14) nuclei is 5570 years |
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Answer» Solution :In OLD wooden atoms the number of `C^(14)` nuclei steadily decreases because of radioactive DECAY. (In live trees biological process keep replenshing `C^(14)` nuclei maintaining a balance. This balance starts GETTING disrupeted as soon as the tree is felled.) If `T_(1//2)` is the half life of `C^(14)` then `e^(-TXX(In 2)/(T_(1//2)))=(3)/(5)` HENCE `t=T_(1//2)(In 5//3)/(In 2)= 4105 years ~~ 4.1 xx10^(3)years` |
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