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A convex lens of focal length 20 cm can ...

A convex lens of focal length 20 cm can produce a magnified virtual as well as real image. Is this a correct statement ? If yes, where shall the object be placed in each case for obtaining these images ?

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To determine if the statement "A convex lens of focal length 20 cm can produce a magnified virtual as well as real image" is correct, and to find the positions of the object for each case, we can follow these steps: ### Step 1: Understanding the Types of Images Formed by a Convex Lens A convex lens can produce two types of images based on the position of the object: - **Real Image**: Formed when the object is placed beyond the focal length (f) of the lens. - **Virtual Image**: Formed when the object is placed between the focal point (f) and the lens. ### Step 2: Confirming the Statement ...
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Knowledge Check

  • 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

  • A concave lens is placed in contact with a convex lens of focal length 25 cm . The combination produces a real image at a distance of 80 cm , when an object is at a distance of 40 cm . What is the focal length of concave lens ?

    A
    `-400 cm`
    B
    `-200 cm`
    C
    `+400 cm`
    D
    `+200 cm`

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