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) (μ1μ2μ1+μ2)d B) dμ1+dμ2 C) (1μ1+1μ2)2d D) (1μ1μ2)2d Answer: Option BExplanation:Apparent Depth = dμ1+dμ2