A mark at the bottom of a liquid appears to rise by \( 0.1 \mathrm{~m} \). The depth of the liqu...

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A mark at the bottom of a liquid appears to rise by \( 0.1 \mathrm{~m} \). The depth of the liquid is \( 1 \mathrm{~m} \). The refractive index of the liquid is
(A) \( 1.33 \)
(B) \( \frac{10}{9} \)
(C) \( \frac{9}{10} \)
(D) \( 1.5 \)
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