Sound waves of wavelength 1m have velocity 340m/s in air. What is their frequency? Can we hear that sound?
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The relationship between the velocity of the sound, its wavelength and frequency is given by the formula v=λ×f,
where, v - velocity of the wave
λ- wavelength of the wave
f - frequency of the wave.
In the question, it is given that the velocity of the wave is 340 m/s and the wavelength is 0.85 m.
Now the frequency is calculated as follows.
v=λ×f,
That is, f= v/λ
f = 0.85/340 =400Hz.
Hence, the frequency of the wave is 400 Hz.
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