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The focal lengths of a thin convex lens ...

The focal lengths of a thin convex lens are 1m and 0.968m for red and blue rays, respectively. Calculate the chromatic aberration and dispersive power of the material of the lens.

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The focal lengths of a thin convergent lens are 0.5m and 0.484m for red and blue rays, respectively. Find the chromatic aberration and dispersive power of the material of the lens.

Focal lengths of a lens for violet, yellow and red colours are f_(v), f_(y) and f_(r) respectively. Calculate the dispersive power of the material of the lens.

Knowledge Check

  • The focal length of a thin convex lens for red and blue rays are 100 cm and 96.8 cm respectively. Then, the dispersive power of the material of the lens is

    A
    0.968
    B
    0.98
    C
    0.0325
    D
    0.325

  • The focal length of a lens is -0.4m. The lens is

    A
    convex
    B
    concave
    C
    cylindrical
    D
    none of these

  • The focal length of a double convex lens is 25.0 cm, its power is

    A
    4.0 D
    B
    `-4.0 D`
    C
    0.04 D
    D
    `-0.04D`

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    The focal length of a thin convex lens for red and violet colour are 44.6cm and 42.5cm . Calculate focal length for the mean colour and dispersive power of the lens.

    The focal lengths of a convex lens for red, yellow and violet rays are 100 cm, 98 cm and 96 cm respectively. Find the dispersive power of the material of the lens.

    The focal lengths of a thin lens for red and violet light are 90.0 cm and 86.4cm respectively. Find the dispersive power of the material of the lens. Make appropriate assumptons.

    The focal lengths of a thin convergent lens are 0.20m and 0.21m for voilet and red lights, respectively, An object is placed at a distance of 0.15m. Calculate the chromatic aberration in the image.

    The focal lenghts of a convex lens for red, yellow and violet rays are 100cm, 99cm and 98 cm respectively. Find the dispersice power of the material of the lens.

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