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If the angle of incidence for a light ray in air is 45° and angle of refraction for glass is 30°. Find refractive index of glass w.r.t. air (√2).




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Using snell's law ,

Refractive index = sin(i)/sin(r)

R. I = sin45°/sin30°

= 1/√2 / 1/2 = 2/√2
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