InterviewSolution
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InterviewSolution
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A sample of rock moon contains equal numbers of atoms of uranium and lead `t_(1//2)` for `U` is `4.5 xx 10^(9)` years. The age of rock would be a. `4.5 xx 10^(9)` years b. `9.0 xx 10^(9)` years c. `13.5 xx 10^(9)` years d. `2.25 xx 10^(9)` years |
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Answer» `t = (2.303)/(K) "log" [1 + (Pb^(206))/(U^(238))]` `implies (2.303 xx 4.5 xx 10^(9))/(0.693) "log" [1 + ((1)/(206))/((1)/(238))]` `:.t = 13.5 xx 10^(9)` years |
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