Question

In a water tank, on throwing a stone 20 full ripples are produced in 1 sec the distance between the creast and through is 10 cm. calculate:
a) the wavelength of ripple
b) frequency of ripple
c) velocity of ripple

Answer 1

As distance between crest and trough is 10 m, the wavelength is 10*2 = 20 m
Frequency = Number of cycles per second or, in this situation, number of full waves per second = 20 Hz
Velocity of ripple = Wavelength * frequency = 20 * 20 = 400 m/s