An observer can see through a pin?hole the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is [IIT-JEE (Screening) 2002]

An observer can see through a pin?hole the top end of a thin rod of he

1.	An observer can see through a pin?hole the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is [IIT-JEE (Screening) 2002]
A.	5/2
B.	\[\sqrt{(5/2)}\]
C.	13.00 cm
D.	3/2
Answer» C. 13.00 cm

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