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 3 h and its radius h. When the beaker is filled with a liquid up to a height 2 h, he can see the lower end of the rod. Then the refractive index of the liquid is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
From 
, we have
By Snell's law
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