A sound wave of wavelength 1 cm travels in air with a speed of 330 m/s. If the wave is infrasonic wave, answer is 1,
if wave is audible wave then answer is 2 and if wave is ultrasonic wave, answer is 3. Mark your answer 1 or 2 or 3,
whichever is correct
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1
Answer:
Velocity of sound wave v=339 ms
−1
Wavelength of the waves λ=1.5 cm =0.015 m
∴ Frequency of the waves ν=
λ
v
=
0.015
339
=22.6 kHz
Audible frequency range for human ear lies between 20 Hz to 20 kHz
Thus this waves is not audible.
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