Questions
Sound waves of wavelength greater than that of audible sound are called
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a
Seismic waves
b
Sonic waves
c
Ultrasonic waves
d
Infrasonic waves
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Correct option is D
Infrasonic waves have frequency less than (20 Hz) audible sound and wavelength more than audible sound.Similar Questions
Ultrasonic signal sent from SONAR returns to it after reflection from a rock after a lapse of 1 sec. If the velocity of ultrasound in water is 1600 ms–1, the depth of the rock in water is
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