Measurement of N, the number of 14 C atoms currently in the sample, allows the calculation of t, the age of the sample, using the equation above. The above calculations make several assumptions, such as that the level of 14 C in the atmosphere has remained constant over time. The calculations involve several steps and include an intermediate value called the "radiocarbon age", which is the age in "radiocarbon years" of the sample: Radiocarbon ages are still calculated using this half-life, and are known as "Conventional Radiocarbon Age".
How Carbon-14 Dating Works
How Carbon Dating Works | HowStuffWorks
How Does Radiocarbon Dating Work? What is Radiocarbon Dating? Despite the name, it does not give an absolute date of organic material - but an approximate age, usually within a range of a few years either way. There are three carbon isotopes that occur as part of the Earth's natural processes; these are carbon, carbon and carbon The unstable nature of carbon 14 with a precise half-life that makes it easy to measure means it is ideal as an absolute dating method. The other two isotopes in comparison are more common than carbon in the atmosphere but increase with the burning of fossil fuels making them less reliable for study 2 ; carbon also increases, but its relative rarity means its increase is negligible.
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All life forms as we know them contain carbon. Stone or materials that don't contain carbon can't be dated with this method. Carbon14 is a midly radioactive isotope of Carbon that naturally appears in nature. The amount of Carbon14 can be used to determine the age of that life form because the Carbon14 decays away with time in known time periods called half-lives.
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