time constant

Noun

 * 1)  A characteristic of an exponential function, represented by τ in the function:
 * $$ y(t) \ = \ y_o e^{-t / \tau} \ $$.
 * 1)  The time in which a physical system's response to a step-wise change in an external variable reaches approximately 63% of its final (asymptotic) value.
 * 2) For radioactivity: the decay constant.

Translations

 * Finnish: aikavakio


 * Finnish: aikavakio