In absolute dating what radioisotope is used
Depending on the particular substance involved, a half-life may be significantly shorter or longer than half of the substance's full period of activity.
The concept of a half-life has been adopted by fields outside of science, such as marketing and finance.
In marketing, half-life is a formula for estimating the total responses to be expected from a direct marketing campaign.
The half-life of a catalog is the day when half of the consumer responses to the mailing have been received.
The photo above is not to make you feel insignificant, it is only for reference and scale. Depending on your field of view, you would have to be around 100,000 light years away to see this Galaxy using the naked human eye.
And as you got closer, it would almost disappear because of the tremendous amount of space there is between everything, like with atoms.
Knowing when a direct marketing campaign reaches the half-life point allows marketers to adapt more quickly to consumer demand.In science, a half-life (also, as a noun, spelled half life ) is the amount of time it takes for half of a substance or entity to undergo some specified process.