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 $
