The light striking a pane of glass is refracted as shown in Figure 4.20. The law of refraction states that na sin ?a = nb sin ?b, where na and nb are the refractive indexes of the materi-als through which the light is passing and the angles are from a line that is normal to the surface. The refractive index of air is 1.00. What is the refractive index of the glass?
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