Answer to Question #38975 in Optics for Nick

Question #38975

A layer of benzene (u =1.5) 12 cm thick floats on water layer (u =4/3) 8 cm thick in a vessel. When viewed from the top, the apparent depth of bottom of vessel below the surface of benzene will be
(1) 20 cm
(2) 14 cm
(3) 7 cm
(4) 21 cm

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