what is the angle of refraction in air?

Question

The speed of sound in water is 1500 m/s. A sound wave from an underwater explosion approaches the surface at an angle of incidence of 60°. What is the angle of refraction in air? (speed of sound in air=340m/s)

Answer 1

Refractive index of air wrt to water

= velocity of velocity of sound in water / velocity of sound in air. = 340/1500= 0.2266

RI = Sini/ Sinr= sin60 / Sin r = 0.2266

plug in Sin60 Get Sinr Then r = angle of refraction in air