A ray of light travels from medium 1 to medium 2, where the velocity of light in medium 1 is c1 and in medium 2 is c2. If the angle of incidence is θ, what is the corresponding angle of refraction in medium 2?
a) θ
b) sin⁻¹ (c1/c2 * sin(θ))
c) cos⁻¹ (c1/c2 * cos(θ))
d) tan⁻¹ (c1/c2 * tan(θ))
