In observer can see through a pin-hole the top end of a thin yod of height h, placed as shown in …

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In observer can see through a pin-hole the top end of a thin
yod of height h, placed as shown in the figure. The beaker
Theight 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.
hen the refractive index of the liquid is
(2002,2 M)
5/2 (b) √(5/2)
(c) √(3/2)
(d) 3/2
Dhuninc 1  V^-2/2

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