1. A ray of light initially in water enters a slab composed of two materials. The incident light ray forms a 20 with the slab as shown below: water 200 Pyrex Special Glass The top layer of the slab is made of pyrex, which has an index of refraction of n = 1.47, and the bottom of the slab is made from a new special type of glass with an unknown index of refraction. The light ray undergoes total internal reflection off of the special glass. You can ignore reflection going from water to pyrex. a) Give a range of possible values for the index of refraction of the special glass. b) At what angle will the ray re-enter the water? Give an angle relative to the horizontal