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Old Oct 21st 2014, 09:17 AM   #1
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radioactivity

Radioactive carbon-14 dating was used to estimate the age of an archeological specimen , the following count rates were obtained.
i cant understand the ans provided, why the ans involve both living wood and archeological specimen?

the question only want archeological specimen ... am i right?
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Old Oct 21st 2014, 11:48 AM   #2
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It appears that they have estimated the age of the sample called "No sample," whatever that means, and not the age of the archaelogical sample. Assuming that "No sample" is a 5g sample, the fact that it emits 1/4 of the radiation as a living 5g sample means that its age is two half lives, or 2 x 5700 = 11,400 yrs. The archaelogical sample is a bit over one half life old - I calculate 6800 years.
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