An observer can see through a pin-hole the top end of a thin rod of height h, placed as…
Physics · JEE Advanced · NTA Exams — Optics
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
- \(\frac{5}{2}\)
- \(\sqrt{\left(\frac{5}{2}\right)}\)
- \(\sqrt{\left(\frac{3}{2}\right)}\)
- \(\frac{3}{2}\)
Answer
(B) ( 5 2 )
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