Half-Life Experiment
Jump to navigation
Jump to search
See: Continuous Probability Function, Half-Life.
References
- (Wikipedia, 2009) ⇒ http://en.wikipedia.org/wiki/Half-life
- The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value. The concept originated in describing how long it takes atoms to undergo radioactive decay but also applies in a wide variety of other situations.
Half-lives are very often used to describe quantities undergoing exponential decay — for example radioactive decay — where the half-life is constant over the whole life of the decay, and is a characteristic unit (a natural unit of scale) for the exponential decay equation. However, a half-life can also be defined for non-exponential decay processes, although in these cases the half-life varies throughout the decay process. For a general introduction and description of exponential decay, see the article exponential decay. For a general introduction and description of non-exponential decay, see the article rate law.
- The converse for exponential growth is the doubling time.
- The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value. The concept originated in describing how long it takes atoms to undergo radioactive decay but also applies in a wide variety of other situations.