Assertion: wave | /r/CapableOf | undulate in time
Facets:
value: with period
type: OTHER
value: periodically
type: TEMPORAL
Source sentences:
text: − v(t + T)) = F(x − vt) provided vT = λ, so an observation of the wave at a fixed location x finds the wave undulating periodically in time with period T = λ/v.