An archaeologist finds an old piece of wood whose carbon 14 carbon 12 ratio is one sixteenth the ratio measured in a newly fallen tree

archaeologist
wood-seem

#1

An archaeologist finds an old piece of wood whose carbon 14 carbon 12 ratio is one sixteenth the ratio measured in a newly fallen tree . How Old does the wood seem to be ?

Answer:

1/16 means 4 half-lives … 1/2 * 1/2 * 1/2 * 1/2 = 1/16
… the half-life of C14 is 5730 yr