In 1896, Antoine Becquerel discovered that a uranium-rich rock emits invisible rays that can darken a photographic plate in an enclosed container. Explain the natural processes that allow the dating of living tissue using 14 C 14 C.Use the radioactive decay law to estimate the age of a substance.Describe the decay of a radioactive substance in terms of its decay constant and half-life.By the end of this section, you will be able to: