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JEE MAIN 2025
08-04-2025 S2
Question
A concave-convex lens of refractive index 1.5 and the radii of curvature of its surfaces are 30 cm and 20 cm , respectively. The concave surface is upwards and is filled with a liquid of refractive index 1.3. The focal length of the liquid-glass combination will be
Select the correct option:
A
$\frac{700}{11} \mathrm{~cm}$
B
$\frac{600}{11} \mathrm{~cm}$
C
$\frac{800}{11} \mathrm{~cm}$
D
$\frac{500}{11} \mathrm{~cm}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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