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JEE MAIN 2025
28-01-2025 SHIFT-1
Question
A hemispherical vessel is completely filled with a liquid of refractive index $\mu$. A small coin is kept at the lowest point (O) of the vessel as shown in figure. The minimum value of the refractive index of the liquid so that a person can see the coin from point E (at the level of the vessel) is____.
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Select the correct option:
A
$\frac{3}{2}$
B
$\sqrt 2 $
C
$\frac{{\sqrt 3 }}{2}$
D
$\sqrt 3 $
✓ Correct! Well done.
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