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Crystalline and Amorphous Solid

A man observe...

Question

A man observed a coin placed at the bottom of a beaker which contains two immiscible liquids of refractive indices 1.2 and 1.4 as shown in the figure. Find the depth of the coin below the surface, as observed from above. ___

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Solution

$d = \frac{3.6}{1.2} + \frac{7}{1.4} = 8$

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