JEE Main 2023 Physics question
A convex lens of refractive index 1.5 and focal length 18 cm in air is immersed in water. The change in focal length of the lens will be cm. (Given refractive index of water = )
Answer: 54
A convex lens of refractive index 1.5 and focal length 18 cm in air is immersed in water. The change in focal length of the lens will be cm. (Given refractive index of water = )