In a ripple tank, 14 full ripples are produced in 1 s. If the distance between a crest and next trough is 12 cm, calculate (i) wavelength and (ii) velocity of the wave.

=$\lambda $ / 2 = 122

=> Wavelength of wave,

$\lambda $, = 12 X 2 . = 24 cm = 0.24 m

{ii) Number of ripples produced in 1 s = 14 Hz

.‘. Frequency of wave, V = 14 Hz As velocity, v = v$\lambda $

.’. v = 14 x 0.24 = 3.36 m/s