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Propagation of Sound Waves — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSPropagation of Sound Waves2 Marks
Question
The separation between two consecutive crests in a transverse wave is $100 m$ . If wave velocity is $20 m s ^{-1}$, find the frequency of wave.
✓

Answer

Given, wavelength $= 100m$
Wave velocity $= 20 m/s$
We know that,
Wave velocity = Frequency x Wavelength
Or, Frequency = Wave velocity / wavelength
Or, ν = $\frac{20}{100} = 0.2 Hz$

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