Answer:
Step-by-step explanation:
Half life is related to the radioactivity. It is used in nuclear physics.
It is the time in which a radioactive substance becomes half of its initial amount.
For example, if the half life of a radioactive substance is 5000 years, it means after 5000 years it becomes half of its initial value or the activity of that substance becomes half after 5000 years.
It is denoted by
