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Questions about carbon dating . Physics Forums

Do Diamonds Refute Radio Carbon Dating?

In the s W. Libby and others University of Chicago devised a method of estimating the age of organic material based on the decay rate of carbon Carbon dating can be used on objects ranging from a few hundred years old to 50, years old. Carbon is produced in the atmosphere when neutrons from cosmic radiation react with nitrogen atoms :. Free carbon, including the carbon produced in this reaction, can react to form carbon dioxide, a component of air. Atmospheric carbon dioxide, CO 2 , has a steady-state concentration of about one atom of carbon per every 10 12 atoms of carbon However, when a plant or animal dies, it stops taking in carbon as food or air. count your

The half-life of carbon is known to be years. Decay rates are usually expressed in terms of their half-life instead of the first order rate constant, where.

Carbon Dating? What is Carbon Dating? The age of archaeological specimens can be calculated by looking at the amount of carbon in a sample. The method is a form of radiodating called carbon dating. Radiodating can also be used to date rocks. How is Carbon formed? The isotope carbon is created at a constant rate in the upper. Carbon dating is a way of determining the age of certain archeological artifacts of a biological origin up to about 50, years old. It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.: Marshall Brain. Question: "Is carbon dating a reliable method for determining the age of things?" Answer: Carbon dating, or radiocarbon dating, like any other laboratory testing technique, can be extremely reliable, so long as all of the variables involved are controlled and understood.

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Questions about carbon dating. Thread starter nabeel17 Start date May 3, So my understanding of carbon dating is that the ratio of C14 to C 12 is known About 1 trillion to 1 and it is the same in the atmosphere as it is in organic material.

Sicne C14 is not stable, it decays and the ratio in the organic compound becomes smaller and smaller since no more C14 is being produced.

Carbon Dating

Using this you can estimate how old the thing was. Questions Once something dies, it can no longer produce an C12 or C 14 correct?

Before I start, I'm not some young earth believer or anything, just want to understand how it works and if the assumptions are fair. So my understanding of carbon dating is that the ratio of C14 to C 12 is known (About 1 trillion to 1) and it is the same in the atmosphere as it is in organic material. Specifically, we know that carbon has varied in the past due to a stronger magnetic field on the earth and changing cycles in sunspot activity. So when objects of known historical dates are dated using radiocarbon dating, we find that carbon dates are accurate back to only about B.C.: Dr. Andrew A. Snelling. So, using carbon dating for fossils older than 60, years is unreliable. Discovery of Carbon Dating. Carbon dating was developed by American scientist Willard Libby and his team at the University of Chicago. Libby calculated the half-life of carbon as , a figure now known as the Libby half-life.

How do we know the ratio of C14 to C12 to be constant. Has it always been 1 to 1 trillion. It seems to me if this is wrong, the whole thing falls apart.

RADIOCARBON DATING HISTORY: EARLY DAYS, QUESTIONS, AND PROBLEMS MET Ingrid U Olsson Department of Physics and Materials Science, University of Uppsala, Sweden. Email: [email protected] ABSTRACT. W F Libbys new dating method from the s, based on experience in physics and chemistry, opened pos-. Carbon dating can be used on objects ranging from a few hundred years old to 50, years old. Here's an example of calculating carbon dating.

What assumptions do we base that this ratio is constant on? How doe we determine the half life of Carbon in the first place, or any element at that?

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Nugatory Mentor. Once something dies, it can no longer produce an C12 or C 14 correct? Last edited: May 3, Nugatory said:.

Questions on carbon dating

There is a tremendous amount of observational evidence and some very compelling theoretical arguments that it has been constant across the time span for which we use carbon dating. Thank you all!

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So there is a slight variation in the carbon ratio over the last couple thousand years and it is non negligible? It is small but not entirely negligible.

What is Carbon Dating?

All assumptions are tested very carefully to the level of obsession b The final results are very accurate because even small effects are taken into account. The isotope carbon - 14 is created at a constant rate in the upper atmosphere by cosmic rays acting on nitrogen.

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The carbon - 14 which is formed is radioactive and decays to produce nitrogen again. There is therefore a fixed amount of carbon - 14 in the environment which is a balance between the rate at which it is formed in the atmosphere and the rate at which it decays back to nitrogen.

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How does Carbon Dating work? All living things take in carbon from the environment.

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Plants take in carbon during photosynthesis. Animals take in carbon when they eat food because food contains carbon.

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