2 Two similar thin equi convex lenses of focal length feach

Last updated: 6/27/2023

2 Two similar thin equi convex lenses of focal length feach are kept coaxially in contact with each other such that the focal length of the combination is F When the space between the two lenses is filled with glycerin which has the same refractive index u 1 5 as that of glass then the equivalent focal length is F The ratio F F will be 1 2 1 2 1 2 3 2 3 4 3 4 Two parallel infinite line chora with lingor