How to calculate age using carbon dating

The universe is full of naturally occurring radioactive elements.

Until this century, relative dating was the only technique for identifying the age of a truly ancient object.So in order to date most older fossils, scientists look for layers of igneous rock or volcanic ash above and below the fossil.Scientists date igneous rock using elements that are slow to decay, such as uranium and potassium.Radiocarbon dating has been one of the most significant discoveries in 20th century science.

Renfrew (1973) called it 'the radiocarbon revolution' in describing its impact upon the human sciences.

The reaction is: (Where n is a neutron and p is a proton).