Three diagrams are given each has equal radial of curvature of the curved surfaces. All the lenses have refractive index mu = 1.5If P and R are used in combination as shown in the diagram (S), then ratio of magnitude of the focallength of P and S is

Three diagrams are given each has equal radial of curvature of the cur

1.	Three diagrams are given each has equal radial of curvature of the curved surfaces. All the lenses have refractive index mu = 1.5If P and R are used in combination as shown in the diagram (S), then ratio of magnitude of the focallength of P and S is
Answer» `1:2` `2:1` `1:1` `3:2` ANSWER :C

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Three diagrams are given each has equal radial of curvature of the curved surfaces. All the lenses have refractive index mu = 1.5If P and R are used in combination as shown in the diagram (S), then ratio of magnitude of the focallength of P and S is

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