The system which uses Radioactivity to decide the Age of materials is known as what ?

Question

In Radiocarbon dating method to estimate the age of organic matters recovered from the archaeological sites, the residual quantity of which carbon isotope in the matter is measured to determine its age ?

Answer 1

Radioactive dating

Radioactive dating (often called Radiometric dating) is a technique used to date materials such as rocks or carbon, based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.

For example say in a rock radioactive X is found and after decay say X produces Y. Say half-life of X is 1m Years. Now under examination X is found in 10 units and Y is found in 30 units. i.e. After 1m Years 40units of X converted to 20 unit of X and 20 units of Y, and after 2m years the result is 10unit of X and 30 unit of Y. So the age of rock is 2m years.