Define the term half-life and illustrate it with an example.

The half-life is defined as, the substance which are radioactive in the nature and it is charactertics constant. It basically measured the duration or time, when the quantity of the substance are reduced by the half with decay consequences. This process is defined the term half-life.

For example - The life of the medical are basically referred to the half life of the biological to drugs and other reactions in the body of human.