Jee Main
Geometrical Optics
JEE Main 2023 (Online) 24th January Evening Shift
INTEGER+4 / -12023
A convex lens of refractive index 1.5 and focal length 18cm in air is immersed in water. The change in focal length of the lens will be ___________ cm.
(Given refractive index of water \(=\frac{4}{3}\))