6.2-8 Reflection from an Absorptive Medium. Use Maxwell's equations and appropriate bound- ary conditions to show that the complex amplitude reflectance at the boundary between free space and a medium with refractive index n and absorption coefficient a, at normal incidence, is r = [(n – jac/2w) - 1/[(n - jac/2w) + 1]. %3D

6.2-8 Reflection from an Absorptive Medium. Use Maxwell's equations and appropriate bound- ary conditions to show that the complex amplitude reflectance at the boundary between free space and a medium with refractive index n and absorption coefficient a, at normal incidence, is r = [(n – jac/2w) - 1/[(n - jac/2w) + 1]. %3D