Use S-Waves and Snells Law. A P-wave with an angle of incidence of 22 (degrees) encounters a contact between two different rock types. The upper layer has a compressional wave velocity of 2700 m/s. The lower layer has a shear velocity of 1100 m/s. Calculate the angle of refraction for the refracted S-wave. (There is an exact question posted on Chegg, which is not correct).