a$.$ The terms below are often used to characterize periodic waves. Give a physical interpretation of each term. $($For example, a physical interpretation of speed, in the case of uniform motion of an object, might be$,$ "the distance the object moves in one unit of time." "How fast the object is moving" would not be an acceptable interpretation.$)$

period $(T)$

frequency or $v($Note: "The reciprocal of the period" or $"\frac{1}{T}"$ is not an interpretation.$)$

wavelength $()$