Three diagrams are given each has equal radial of curvature of the curved surfaces. All the lenses have refractive index mu = 1.5The ratio of focal lengths of P, Q, R 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 = 1.5The ratio of focal lengths of P, Q, R is
Answer» `1: -2 : 1` `-1 : 2: 1` `-2:1:1` `1:2:-1` ANSWER :A

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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 = 1.5The ratio of focal lengths of P, Q, R is

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