Is carbon dating correct

23-Nov-2015 04:02 by 9 Comments

Is carbon dating correct - consolidating credit cards credit score

In case of discrepancy in such a fundamental assumption, the end results might be flawed.► With the advancement of nuclear reactors and weapons, it is possible that the amount of carbon-14 has changed in the recent years, specially carbon data from the 1950s and 1960s are questionable.There is also the likelihood of the sample being contaminated with old or new carbon.

An unstable form of carbon isotope, carbon-14, also known as radiocarbon, is formed when cosmic rays hit atoms in the upper atmosphere of the earth.The rate of C-14 production today is 18% higher than the rate of decay (Whitelaw).This means that today we are experiencing a net increase in the proportion of C-14 in the atmosphere.Plants get their share of carbon atoms from the atmosphere. It is seen that at any given point of time, the ratio of stable carbon and radiocarbon in the atmosphere, is almost same as the ratio of stable carbon and radiocarbon in living organisms like plants, animals, and humans.When a living organism dies, its carbon intake ceases.By comparing age of a sample deduced by using carbon-14 dating to results from other dating techniques, discrepancies have been noticed.

Scientists have concluded that the ratio of carbon-12 to carbon-14 might not have been constant over the past 10,000 years.

When cosmic rays collide with the atoms, it creates an energetic neutron, which, upon hitting a nitrogen atom (7 neutrons and 7 protons), creates a carbon-14 atom (6 protons and 8 neutrons) and a hydrogen atom (1 neutron, 0 proton).

Carbon-14 is radioactive, and has a half life of about 5700 years.

By comparing the ratio of carbon-12 and carbon-14 in a sample to that of a living organism, it is possible to determine the age of an archaeological object, with a fair accuracy.

The ratio of carbon-12 and carbon-14 is determined by three techniques, namely gas proportional counting, liquid scintillation counting, and accelerator mass spectrometry.✶ Let's say that the given sample has 15 percent carbon-14, as compared to the living sample. Then the age of the given sample would be: t = [ ln (.15) / (-.693) ] x 5700 years = [ ln (-1.897) / (-.693) ] x 5700 years = 1.3146 x 5700 years = 7493 years old► Carbon dating cannot be used to date organisms that doesn't intake carbon dioxide form the air.

Hence, it would not be possible to determine the age of a sample accurately.