Suppose that a P-wave ray produced by an ex plosion detonated 5 m beneath the ocean sur face travels down through the water and reaches solid rock on the ocean bottom at an angle of incidence i 30 degrees. P-wave speed is 1500 m/s in the water and 5000 m/s in the rock. a. How many reflected and refracted rays are generated by this incident ray? b. What is the angle of refraction of the re fracted P-wave ray?