An incoming ray of light has a vacuum wavelength of 589 nm.?

a) If the light travels from flint glass (n = 1.66) to crown glass (n = 1.52) with an angle of incidence of 12.0◦, find the angle of refraction. Answer in units of ◦ .

b) If the light travels from air to some medium with an angle of incidence of 18.3◦ and an angle of refraction of 10.1◦ , find the refractive index of the unknown medium.

c) If the light travels from air to diamond (n = 2.419) at an angle of incidence of 38.8◦ ,
find the angle of refraction. Answer in units of ◦.