Dangers of carbon 14 dating
Since carbon -14 decays, while the amount of carbon -12 remains constant in the sample, then the ratio of carbon -12 to carbon -14 in the sample diminishes as time passes.By comparing the ratio for the sample under investigation to the ratio in a living organism, it is possible to determine the age of the sample.
However, once the organism dies, the amount of carbon-14 steadily decreases. Supplies of Carbon14 are replenished by cosmic ray. Scientists use radioactivity to determine the age of many ancient objects. It is used in dating things such as bone, cloth and wood or in fact anything that was made of matter that once lived.Animals and people eat plants and take in carbon-14 as well.The technique used is called carbon dating, and in this lesson we will learn what this is and how it is used. Carbon dating, or radiocarbon dating, is a method used to date materials that once exchanged carbon dioxide with the atmosphere. In the late 1940s, an American physical chemist named Willard Libby first developed a method to measure radioactivity of carbon-14, a radioactive isotope.Libby was awarded the Nobel Prize in chemistry for his work in 1960.
Pro The half life of radioactive substances are empirically determined.