A tank is filled with benzene to a height of 120 mm. The apparent dept – McqOptions

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1.	A tank is filled with benzene to a height of 120 mm. The apparent depth of a needle lying at a bottom of the tank is measured by a microscope to be 80 mm. The refractive index of benzene is [Pb. PMT 1999]
A.	1.5
B.	2.5
C.	3.5
D.	4.5
Answer» C. 3.5

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