How does carbon-14 dating work? How can it tell a basket is 3000 years old, for example?
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First, the researchers find the amount of C14 present in a normal ( present day) basket which is similar to the (3000 yr) old one , and then they compare it with the amount of C14 present in that (3000 yrs) old basket and calculate the time taken by C14 to decrease to that amount ( present in old basket).
They calculate it by using the half life of C14, since it is radioactive.
Half life is the time taken by a radioactive substance to decrease to half of its original amount.
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