What is Period (physics)?
[[File:Simple harmonic motion.svg|thumb]] A time period (denoted by ''''''T''''''<nowiki/>' ) is the time taken for one complete [[cycle]] of [[vibration]] to pass a given point.<ref>Tongue, Benson, ''Principles of Vibration'', Oxford University Pres, 2001, {{ISBN|0-195-142462}}</ref> As the [[frequency]] of a [[wave]] increases, the time period of the wave decreases. The unit for time period is 'seconds'. ''Frequency'' and time ''period'' are in a [[reciprocal]] relationship that can be expressed mathematically as: '''T = 1/f''' or as: '''f = 1/T'''. * [[Orbital period]] is the time for something to go round ([[orbit]]) something else. * The period of a [[pendulum]] is the time it takes from one side to the other and back. * An [[electron]] moving in a [[helix|helical]] orbit that has an axis at [[right angle]]s to the [[magnet]]ic field has a period given by '''''T=2πm/qB''''', where m is the mass of the electron, q is the charge of the electron and B is the [[magnetic field]] in the region. ==Related pages== *[[Amplitude]] *[[Damping]] *[[Resonance]] *[[Sine wave]] ==References== {{commons category|Mechanical vibrations}} {{reflist}} {{physics-stub}} [[Category:Wave physics]] [[Category:Mechanical vibrations]]