// Persistence of Vision Raytracer 2.0 // // This file defines a few Index of Refractions for various materials // for sodium light. Source: College Physics by Arthur L. Kimball, PhD. // 4th Edition (1923)(!) // --------------------------- #declare Flint_Glass_Ior = 1.71 #declare Crown_Glass_Ior = 1.51 #declare Diamond_Ior = 2.47 #declare Water_Ior = 1.33 #declare Air_Ior = 1.000292