A trough \(12.0 \mathrm{~cm}\) deep is filled with water of refractive index \(4 / 3\). By how much would a coin at the bottom of the trough appear to be displaced when viewed vertically from above the water surface?

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A trough \(12.0 \mathrm{~cm}\) deep is filled with water of refractive index \(4 / 3\). ...

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