A layer of benzene (μ=1.5) having thickness 12cm floats in a vessel on water layer (μ=4/3) having thickness 8cm. When viewed from top obliquely, the apparent depth of the bottom of the vessel below the surface of benzene will be
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Solution
For the multiple media of different refractive index,
Apparent depth, dapp=t1μ1+t2μ2 ⇒dapp=121.5+84/3=14cm
Thus, the bottom of the vessel will appear at a depth of 14cm.
Why this question?
It tests your understanding of apparent depth, when more than one media is present.