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where <math>A_0</math> is the value at time <math>t_0</math> and <math>\tau</math> expresses the rate of exponential decay. The quantity reaches one-half of its original value after a time interval equal to <math>\tau</math> ln 2, which is called its [[half-life]].
where <math>A_0</math> is the value at time <math>t_0</math> and <math>\tau</math> expresses the rate of exponential decay. The quantity reaches one-half of its original value after a time interval equal to <math>\tau</math> ln 2, which is called its [[half-life]].
==See also==
*[[Exponential growth]]
[[Category:Physics]]
[[Category:Physics]]