When light refracts into a material where its speed is lower $($i$.$e$,$ air to water$),$ the angle of refraction is less than the angle of incidence. We say that the ray bends toward the normal. When light refracts into a material where its speed is higher $($i$.$e$.$ water to air$),$ the angle of refraction is greater than the angle of incidence. We say that the ray bends away from the normal.

Snell$$s Law of Refraction describes a mathematical relationship between angle of refraction and the angle of incidence for light going between different transparent materials. It works as follows:

Where and are the indexes of refraction for the two materials and are the angles of incidence and refraction.

Conceptually, the difference in the angle of refraction and the angle of incidence will be bigger for bigger differences in the indices of refraction. There are $5$ materials in this simulation: air, water, glass, mystery A$,$ and mystery B$.$ Using whatever method that you want, Rank the materials in terms of the index of refraction with the one that has the highest index first.