A ray of light is incident on a glass block in such a way that the angle between the reflected ray and the refracted ray is 90. Establish the relationship between the angle of incidence and the refractive index of the glass.
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If i is the angle of incidence of a ray in vacuum (angle between the incoming ray and the perpendicular to the surface of a medium, called the normal) and r is the angle of refraction (angle between the ray in the medium and the normal), the refractive index n is defined as the ratio of the sine of the angle of
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