Question

The wavelength of the vibrations produced on the surface of water is 2 cm. If the wave velocity is 16 ms^-1, calculate:

1. no. of waves produced in one second
2. time required to produce one wave.

Answer 1

wavelength = λ = 2 cm = 0.02 m

Wave velocity = v = 16 ms^-1 

Frequency = f = ?

We know = v = λf

f = `"v"/lambda`

f = `16/0.02` = 800 Hz

⇒ 800 waves are produced in one second.

Time period = T = `1/"f"`

T = `1/800`

T = 0.00125s