It's created when cosmic rays (which bathe the earth and our bodies all the time) collide with atoms in the atmosphere.
The carbon-14 atoms then combine with aroms of oxygen to form carbon dioxide, which is absorbed by plants, and then by animals and humans who eat these plants.
This infinate number of isotopes decays with clockwork regularity.
Archaeologists simply need to study a sample of tissue or hair, measure the amount of carbon-14 left and they can then estimate when the death occured.
This must happen, however, before 60,000 years has passed; otherwise the amount of carbon-14 left is too small to be accurately detected.
I've come up with dating of religious artefacts like the Shroud of Turin, and I thought human evolution but apparently it's not usefull.. Question is: The invention of radiocarbon dating has revolutionised archaeology.
I just can't come up with examples of how it's been useful. I've come up with dating of religious artefacts like the Shroud of Turin, and I thought human evolution but apparently it's not usefull..
I just can't come up with examples of how it's been useful.
Give a brief history of the development of this method and then give several examples of cases that support this statement. Carbon Dating was discovered by Willard Frank Libby in 1947.
Radiocarbon dating is used to estimate the afe of organic remains, ie plant, animal or human, up to roughly 60,000 years old.
Carbon dating gives archaeologists a sense of WHEN their site or artifact may have been used, often with a hig degree of accuracy.
Carbon is found in nature in three isotopes: carbon-12, carbon-13, and carbon-14.
Carbon 12 and 13 are stable and common, whereas carbon-14 is unstable and rare.