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REFRACTIVE INDICES OF VARIOUS MATERIALS Material Refractive Index Material Refractive Index (Average) Glasses Silica glass Soda-lime glass Borosilicate glass Flint optical glass 1.46 1.51 1.47 1.6-1.7 Ceramics CaF, MgO Al,0, Quartz (SFO) Rutile (TiO) Litharge (Pho) Calcite (CaCO3) LiNbO, Pbs Diamond Polymers Polyethylene Polypropylene Polystyrene Polymethyl methacrylate 1.434 1.74 1.76 1.55 2.71 2.61 1.65 2.31 3.91 2.42 1.51 1.49 1.60 - Data were taken from several sources 100 - Rh 80 P: 60 Cuv Percentage of reflectance Au 40 20 Ag o LE 0.2 0.5 1 2 5 10 20 Wavelength (um) Reflectance of gold, silver, copper, aluminum, rhodium, and platinum mirror coatings as a function of wavelength Material Science Engineering and Kinetics Question 1. Assume you are given the task of designing the following alloys for the cheapest cost. (Assume the price of Au is $400/oz; Ag, $5/oz; and Cu, $0.1/oz.) a. A red 8-kt gold alloy b. A green-yellow 18-kt gold alloy. How much of each element should be added and what is the alloy cost per ounce