Ionic EquilibriumHard
Question
A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices μ1 and μ2 and R is the radius of curvature of the curved surface of the lenses, then the focal length of combination is
Options
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B.
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D.
Solution
Equivalent focal length is given by
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