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An observer can see through a pin-hole the top end of a thin rod of height , placed as shown in the figure. The beaker height is  and its radius . When the beaker is filled with a liquid up to a height , he can see the lower end of the rod. Then the refractive index of the liquid is

a)

5/2

b)

c)

d)

3/2


Question ID - 152711 | Toppr Answer

An observer can see through a pin-hole the top end of a thin rod of height , placed as shown in the figure. The beaker height is  and its radius . When the beaker is filled with a liquid up to a height , he can see the lower end of the rod. Then the refractive index of the liquid is

a)

5/2

b)

c)

d)

3/2

1 Answer - 5876 Votes

3537

Answer Key : (b) -

(b)

The line of sight of the observer remains constant making an angle of  with the normal



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