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A convex lens L(1) and a concave lens L(...

A convex lens `L_(1)` and a concave lens `L_(2)` have refractive index `(3)/(2)`. Match the following two columns.

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A(p, s), B(q, s), C(q, s), D(p,s)
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A thin convex lens has focal length f_(1) and a concave lens has focal length f_(2) . They are kept in contact. Now, match the following two columns.

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Knowledge Check

  • A plano-convex lens is made of refractive index of 1.6. The focal length of the lens is

    A
    400 cm
    B
    200 cm
    C
    100 cm
    D
    50 cm

  • The radius of curvature of the convex face of a plano convex lens is 12cm and the refractive index of the material of the lends 1.5. Then, the focal length of the lens is

    A
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    B
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    C
    18cm
    D
    24cm

  • The radius of the convex surface of plano-convex lens is 20 cm and the refractive index of the material of the lens is 1.5. The focal length of the lens is

    A
    `30 cm`
    B
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    C
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    D
    `40 cm`

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