1) A vessel of depth 2d cm is half-filled with a liquid of refractive index μ1, and the upper half with a liquid of refractive index μ2. The apparent depth of the vessel seen perpendicularly is A) $\left(\frac{\mu_{1}\mu_{2}}{\mu_{1}+\mu_{2}}\right)d$ B) $\frac{d}{\mu_{1}}+\frac{d}{\mu_{2}}$ C) $\left(\frac{1}{\mu_{1}}+\frac{1}{\mu_{2}}\right)2d$ D) $\left(\frac{1}{\mu_{1}\mu_{2}}\right)2d$ Answer: Option BExplanation:Apparent Depth = $\frac{d}{\mu_{1}}+\frac{d}{\mu_{2}}$
