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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2001
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A disc is placed on a surface of pond which has refractive index $\frac{5}{3}$. A source of light is placed 4 m below the surface of liquid. The minimum radius of disc will be so light is not coming out


( A ) $\infty$
( B ) 4 m
( C ) 3 m
( D ) 6 m

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