sound wave from an underwater explosion & 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

Critical angle for water- air surface for sound is about 13 degrees . So if angle of incidence in water is greater than 60 degrees ,it will suffer total internal reflection with angle of reflection back in water will be 60 degrees