Question

What happens when a sound wave moves from water to air?

Answer 1

Well sound travels much faster in water than air. So the wave is both reflected and transmitted. Some goes into the water, and goes faster, and some bounces back.

Answer 2

In the air, the sound coming from water will slow down.

The sound travels by the vibration of the molecules and particles present in the medium. The water is dense medium and the molecules present in water are closely packed as compared to the air.

Due to close packing in the water molecules, the sound travels faster as compared to the air, as the molecules in the air are quite apart. So, the speed of sound coming from water to air would be slow down.