Voices of swimmers at a pool travel 400 m/s through the air and 1,600 m/s underwater. The wavelength changes from 2 m in the air to 8 m underwater.
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Means it is more than 2 times then sound thenin air the sound if 16 m,per sec
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The recurrence of the wave has not changed.
Indeed, the recurrence of a wave is given by: where v is the wave's speed and is the wavelength.
With media thickness increment, wavelength increments also.
Applying the recipe: - In air, the recurrence of the wave is: - submerged, the recurrence of the wave is: So, the recurrence has not changed.
Longer wavelength brings down its recurrence and the other way around.
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