Answer:
When the sound wave enters the water its wavelength increase.
Explanation:
Given:
Speed of sound in air
Speed of sound in fresh water
We know that when wave travel into one medium to another medium frequency doesn't change.
Velocity is given by,
In above equation frequency is constant,
So when sound wave enters the water wavelength increase because speed sound is increase in water as compare to air.
Therefore, when the sound wave enters the water its wavelength increase.