The refractive index of an optically transparent material can be expressed by the Sellemeier equation: m2 -1=EAE x² - Bim where n is the refractive index, ) is the wavelength and Am and Bm are constants. For silica and MgF2, these constants are given below: Bi A2 B2 B3 Material А, А Silica 0.6961663 0.0684043 0.4079426 0.1162414 0.8974794 9.896161 MgF2 0.48755108 0.04338408 0.39875031 0.09461442 2.3120353 23.793604 Plot the refractive index of silica and MgF2 for a wavelength range of = 400 - 1000 nm.