Standing Waves Try following simulation with a) Damping= none; A = 0.05 cm and f = 0.41 Hz b) Damping= none; A = 0.05 cm and f = 0.82 Hz c) Damping= none; A = 0.05 cm and f = 1.24 Hz d) Damping= none; A = 0.05 cm and f = 2.48 Hz The amplitude (`A`) is the maximum height of a crest or depth of a trough, relative to the normal (or equilibrium) level. The wavelength (`λ`) is the distance between two successive crests. (`λ` is the Greek letter lambda) The frequency (`f`) is the number of crest (or complete cycles ) that pass a given point per unit time. The period (`T`) is the time elapsed between two successive crests passing by the same point in space. (`T = 1/f`) A wave crest travels a distance of one wavelength in a time equal to period. Thus the wave velocity is The speed of a wave depends on the properties of the medium in which it travels. The speed of a wave on a stretched string or cord, depends on the tension in the cord, `F_T`, and on the cord's mass per unit length, `m/L`: