Answers in genesis radiocarbon dating
The bold line at the 100% level represents the generally accepted assumption that for thousands of years the original content has been at the same level as what is observed in the atmosphere in modern times.The small box on the decay curve represents the current level of a particular once-living specimen, in this instance measured at 50% of its assumed original content.Testing the accuracy of this required fact is limited and subject to a huge array of possible assumptions.Carbon-14 is rare, Plants are eaten by animals, and living things on Earth become ever-so-slightly radioactive due to ingesting things containing C14. When they strike atoms in the atmosphere, chain reactions occur, some of which result in free neutrons (n) that readily react with nitrogen-14 to form C14.For example: “Nobody cites the many hundreds of C Carbon-14 is radioactive—therefore, it decays over time.It can be used as a dating tool because creatures and plants accumulate it during their lifetimes, and cease doing so when they die. If four essential facts are known, an age can be calculated with precision.They are: (1) the C14 concentration in a specimen at its time of death; (2) the decay rate of C14; (3) the current C14 concentration in the specimen being “dated”; and (4) if anything else has affected the specimen’s C14 content. The curved line represents the declining amount of C14 atoms over time due to radioactive decay.Note: only the third of those four necessary facts can be measured, the other three must be estimated, assumed, or extrapolated. During each half-life (~5,730 years), about half of the remaining C14 atoms in a specimen are expected to decay.
(See the “Assumption Error” section later in this paper for more details.) The decay rate of C14 is estimated by comparing measurements taken in the recent past with C14’s current radioactivity levels.
Therefore, he used modern C14 levels to approximate the ancient. Estimated years since a specimen died based on how much C14 was believed to have decayed since the death of the specimen.
The curved line represents the loss of C14 over time due to radioactive decay.
Indeed, experiments have led to a startling conclusion: that C14 levels in the past were lower than they are now.
If the experimental data was correctly collected and interpreted, Libby’s assumption in estimating the original content is wrong.