Question

Select One Correct Option from the following: An observer can see through a pinhole at the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius is 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
(A) $\frac{5}{2}$
(B) $\sqrt{\frac{5}{2} }$
(C) $\sqrt{\frac{3}{2} }$
(D) $\frac{3}{2}$.

Answer 1

d option is correct I think

Answer 2

Select One Correct Option from the following: An observer can see through a pinhole at the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius is 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

(A) $\frac{5}{2}$

(B) $\sqrt{\frac{5}{2} }$

(C) $\sqrt{\frac{3}{2} }$

✔️ (D) $\frac{3}{2}$.