Optics Question 758

Question: 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]

Options:

A) 1.5

B) 2.5

C) 3.5

D) 4.5

Show Answer

Answer:

Correct Answer: B

Solution:

$ \mu =\frac{\text{Real depth}}{\text{apparent depth}}=\frac{120}{80}=1.5 $



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