When the two refractive indices are equal ( n(1) = n(2)), then the light is passed through without refraction. Alternatively when n(2) is greater than n(1) the angle of refraction is always smaller than the angle of incidence.
When n(1) is greater than n(2), the angle of refraction is always larger than the angle of incidence.
There are several important points that can be drawn from this equation. Where n represents the refractive indices of material 1 and material 2 and θ are the angles of light traveling through these materials with respect to the normal.
