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A half diminished virtual, erect image is formed 12 cm closer to mirror than the object, when the object is placed in front of a spherical mirror. What type of mirror is used and what is its focal length?

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A half diminished virtual, erect image is formed 12 cm closer to the lens than the object when the object is placed in front of a spherical lens. What type of lens is used and what is its focal length?

A half diminished virtual erect image is formed 12 cm behind a mirror. What type of mirror is used? Calculate the focal length of the mirror used.

Knowledge Check

  • A spherical mirror is held in water , its focal length :

    A
    increases
    B
    decreases
    C
    remains same
    D
    may increases or decreases for convex or concave mirror

  • A convex mirror has a focal length f. An object is placed at a distance f/2 infront of it from the pole. The mirror produces an image at

    A
    infinity
    B
    f
    C
    2f
    D
    f/3

  • A convex mirror has a focal length f. An object is placed at a distance f//2 infront of it from the pole. The mirror produces an image at

    A
    infinity
    B
    f
    C
    2f
    D
    `f//3`

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    A virtual, erect, thrice magnfiied image is formed on the same side of the lens as the object. The image is formed 12 cm behind the object. What type of lens is used and hwat is its focal length? Draw the scheme diagram.

    A diminished virtual image can be obtained only in……… type of mirror.

    An object is placed in front of the mirror. But the image is found to be formed behind the mirror. The image is

    Diminished, virtual image can be produced by a concave mirror for all positions of the object.

    The magnification, of the virtual, erect image is found to be one for all positions of the object. The mirror is

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