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| 1. |
a convex lens immersed in water of refractive index 4/3 has a focal length of 40 cm and the same lens when immersed in a liquid of refractive index 2 has a focal length of -20 cm. the refractive index of the material of the lens is. |
| Answer» a convex lens immersed in water of refractive index 4/3 has a focal length of 40 cm and the same lens when immersed in a liquid of refractive index 2 has a focal length of -20 cm. the refractive index of the material of the lens is. | |