When a sound wave moves from air into water, the speed of the wave increases. The frequency of the sound wave does not change.
<br><br>
Complete the sentence. Choose the answer from the box.
<br><br>
When a sound wave moves from air into water its wavelength __________.

The relationship between wave speed (v), frequency (f), and wavelength (λ) is given by the wave equation: v = f × λ. When a wave passes from one medium to another, its frequency remains constant. The question states that the speed (v) of the sound wave increases when it moves from air to water. If we rearrange the equation for wavelength, we get λ = v / f. Since v increases and f stays the same, the wavelength (λ) must also increase.