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A thin lens of focal length +10.0 cm lie...

A thin lens of focal length `+10.0 cm` lies on a horizontal plane mirror. How far above the lens should an object be held if its image is to coincide with the object?

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A thin lens of focal length +10.0 cm lies on a horizontal plane mirror. How far above the lens should an object be be held if its image is to coincide with the object?

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Knowledge Check

  • An object is placed in front of a thin convex lens of focal length 30cm and a plane mirror is placed 15cm behind the lens.If the final image of the object coincides with the object the distance of the object from the lens is

    A
    `60cm
    B
    `30cm`
    C
    `15cm`
    D
    `25cm`

  • A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

    A
    real, at 30 cm in front of the mirror
    B
    real, at 30 cm behind the mirror
    C
    real, at 10 cm in front of the mirror
    D
    virtual, at 10 cm behind the mirror

  • An object is placed at 15 cm from a convex lens of focal length 10 cm. Where should another convex mirror of radius 12 cm placed such that image will coincide with object.

    A
    18 cm
    B
    17 cm
    C
    14 cm
    D
    20 cm

    • Similar Questions

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    An object if placed at a distance of 15cm from a convex lens of focal length 10cm on the other side of the lens, a convex mirror is placed at its foxus such that the image formed by combination coincides with the object itself. Find the focal length of concave mirror.

    A point object is placed at a distance of 12 cm on the principal axis of a convex lens of focal length 10cm. A convex mirror is placed coaxially on the other side of the lens at a distance of 10cm. If the final image coincides with the object, sketch the ray diagram and find the focal length of the convex mirror.

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