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Q.

A ray of light falls on transparent sphere with centre at C as shown in the figure. The ray emerges from the sphere parallel to the line AB. The refractive index of the sphere is x  then x is

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answer is 3.

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Detailed Solution

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Exterior angle is sum of opposite interior angles 600=r+r ⇒r=300  Apply Snell's Law ∴μ=sin600sin300=3212∴μ=3  Hence, x= 3  

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