# Apparent depth due to refractive index change

A beaker contains water up to height of H1 and K-oil above water up to another height H2. Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is n1 and that of kerosene is n2.

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The apparent shift of the bottom due to the water is,

dt1 = ...

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With mathematical steps to arrive at the final answer

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