Jee Main
Geometrical Optics
JEE Main 2025 (Online) 8th April Evening Shift
MCQ+4 / -12025
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