Like reflections the incident ray, the refracted ray and the normal all lie in the same place however the angle of refraction is always less than the angle of incidence.
Since temperature and sound velocity normally decrease with increasing altitude, sound is refracted upward, away from listeners on the ground, creating an acoustic shadow at some distance from the source.
Some butterflies get their fabulous colors from light refracted through membrane shapes that were first discovered by mathematicians and applied in space-age material science.