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A ray of light travelling in a transparent medium ofrefractive index u - falls on a surface separating themedium from air at an angle of incidence ofFor which ofthe following value of u the ray can undergo totalinternal reflection? [2010]

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A ray of light travelling in a transparent medium ofrefractive index u - falls on a surface separating themedium from air at an angle of incidence ofFor which ofthe following value of u the ray can undergo totalinternal reflection? [2010]






 
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