A sound wave having a wavelength of 2 cm is travelling in water. If the vel

Question

A sound wave having a wavelength of

2 c m

is travelling in water. If the velocity of sound in water is

1600 m s^{- 1}

. What is the frequency of the sound wave?

Options:

A . 8000 Hz

B . 80000 Hz

C . 70000 Hz

D . 16000 Hz

Answer: Option B
:
B
Given:
Speed of sound wave,

v = 1600 m s^{- 1}

Wavelength,

λ = 2 c m = 0.02 m

Let

f

be the frequency of the wave.
Speed of sound is given by:

v = f λ

f = \frac{1600 m s^{- 1}}{0.02 m} = 80000 H z .

Frequency of the sound wave is

80000 H z

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