Physics answers half life and radioactive dating
The count rate is measured by using an instrument called a Geiger-Muller tube over a period of time.A Geiger-Muller tube detects radiations by absorbing the radiation and converting it into an electrical pulse which triggers a counter and is displayed as a count rate. ] Radioactive elements have a wide range of half life values.In the medical field, the radioactive isotope Cobalt 60 has been used for radiotherapy to shrink tumors that will later be surgically removed, or to destroy cancer cells in inoperable tumors.When it decays to stable nickel, it emits two relatively high-energy gamma rays.
Some questions to get the students started thinking about these concepts: It is relatively easy to get a quick check on whether students have grasped several concepts: half-life, probability, dependence on quantity and exponential functions.
Archeologists and geologists use half-life to date the age of organic objects in a process known as carbon dating. At the time of death organisms stop producing carbon 14.
Since half life is a constant, the ratio of carbon 14 to nitrogen 14 provides a measurement of the age of a sample.
The five categories included in the process are 75 students).
It is a great way to introduce or reinforce the concepts involved in radioactive decay.