periodetiden
Periodetiden is a term used to describe the duration of one cycle of a periodic phenomenon—the time interval between two successive identical points in the cycle. It is the temporal length of one period and is the reciprocal of the frequency of the process: f = 1/T, or T = 1/f. The SI unit for period is the second, but period lengths can range from milliseconds in electronics to years in astronomical or geological contexts.
Periodetiden is used across disciplines to characterize repeating processes such as a pendulum's swing, alternating current,
Examples: a simple pendulum of about 1 meter has a period near 2 s; a 50 Hz
Notes: In some contexts, Swedish texts may prefer terms like ‘periodens längd’ or ‘periodtid’; the exact terminology