Compute the following question given below:
Question: A costume jewelry pendant made of cubic zirconia is submerged in oil. A light ray strikes one face of the zirconia crystal at an angle of incidence of 18o.
Question 1: Once inside, what is the ray angle with respect to the face of the crystal?
I need help to calculate the ray angle with respect to the face of the crystal and note that the angle we need to find is complementary to the refraction angle. Express your answer to two significant figures and include the appropriate units.