How do scientists use the knowledge of radioactive dating

Plants produce carbon-14 through photosynthesis, while animals and people ingest carbon-14 by eating plants. Scientists determine the ages of once-living things by measuring the amount of carbon-14 in the material.For biological objects older than 50,000 years, scientists use radioactive dating to determine the age of rocks surrounding where the material was found.Let's look closely at how the half-life affects an isotope. Therefore, after one half-life, you would have 5 grams of Barium-139, and 5 grams of Lanthanum-139.After another 86 minutes, half of the 5 grams of Barium-139 would decay into Lanthanum-139; you would now have 2.5 grams of Barium-139 and 7.5 grams of Lanthanum-139.By dating rocks, scientists can approximate ages of very old fossils, bones and teeth.Radiocarbon dating was invented in the 1940s by Willard F. Radioactive dating is used in research fields, such as anthropology, palaeontology, geology and archeology.How do scientists know the bones are really 68 million years old?

Radioactive dating uses the decay rates of radioactive substances to measure absolute ages of rocks, minerals and carbon-based substances, according to How Stuff Works.

Scientists can use the half-life of Carbon-14 to determine the approximate age of organic objects less than 40,000 years old.

By determining how much of the carbon-14 has transmutated, scientist can calculate and estimate the age of a substance. Isotopes with longer half-lives such as Uranium-238 can be used to date even older objects.

In the field of nondestructive testing radiographers (people who produce radiographs to inspect objects) also use half-life information.

A radiographer who works with radioisotopes needs to know the specific half-life to properly determine how much radiation the source in the camera is producing so that the film can be exposed properly.

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