The laws of reflection or refraction are the same for sound as for light. The index of refraction of a medium (for sound) is defined as the ratio of the speed of sound in air 343 m/s to the speed of sound in the medium.
a. What is the index of refraction (for sound) of water ( v=1498 m/s )?
b. What is the critical angle θ , for total reflection of sound from water?