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InterviewSolution
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You are given a very old sample of wood. How will you determine its age? |
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Answer» The age of the wood sample can be determined by radiocarbon dating as 14C becomes a part of a plant due to the photosynthesis reaction (i.e., absorption of [14CO2 + 12CO2]). i. The activity (N) of given wood sample and that of fresh sample of live plant (N0) is measured, where, N0 denotes the activity of the given sample at the time of death. ii. The age of the given wood sample. can be determined by applying following Formulae : t = \(\frac{2.303}{\lambda}log_{10}\frac{N_o}{N}\) Where λ = \(\frac{0.693}{5730y}\) = 1.21 x 10-4 y-1. Note : The oldest rock found so far in Northern Canada is 3.96 billion years old. |
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