Home
Class 12
PHYSICS
Where should an object be placed from a ...

Where should an object be placed from a convex lens to from an image of the same size ? Can it happen in case of a concave lens ?

Text Solution

Verified by Experts

The object has to be placed at a distance `2 f` from the lens. No, it cannot happen in case of a concave lens, as image formed is always smaller in size.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • OPTICS

    PRADEEP|Exercise Very short answer question|5 Videos

  • OPTICS

    PRADEEP|Exercise very short answer questions|1 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Competition Focus (Multiple Choice Questions)|2 Videos

Similar Questions

Explore conceptually related problems

Where should an object be placed in front of a convex lens to get a real image of the size of the object ?

(i) Rohit claims to have obtained an image twice the size of the object with a concave lens. Is he correct? Give reason for your answer. (ii) Where should an object be placed in case of a convex lens to form an image of same size as of the object? Show with the help of ray diagram, the position and nature of image formed? (iii) With the help of ray diagram, illustrate the change in position, size and nature of image formed if convex lens in case of (ii) is replaced by a concave lens of same focal length.

Knowledge Check

  • Where should an object be placed in front of a convex lens to get a real image of the size of the object ?

    A
    At the principal focus of the lens
    B
    At twice the focal length
    C
    At infinity
    D
    Between the optical centre of the lens and its principal focus.

  • Where should an object be placed so that a real and inverted image of the same size is obtained by a convex lens?

    A
    at the focus of the lens
    B
    at twice the focal length
    C
    at infinity
    D
    between the optical centre of lens and its focus

  • Where should the object be kept in front of a concave lens to obtain enlarged image?

    A
    Between infinity and 2F
    B
    Between 2F and F
    C
    Between Fand optical centre
    D
    None of the these

    • Similar Questions

    Explore conceptually related problems

    (i) Rohit claims to have obtained an image twice the size of object with a concave lens. Is he correct? Give reason for your answer. (ii) Where should an object be placed in case of a convex lens to form an image of same size as of the object? Show with the help of ray diagram the position and the nature of the image formed. (iii) With teh help of ray diagram, illustrate the change in position, nature and size of the image formed if the convex lens in case of (ii) is replaced by concave lens of same focal length.

    Where should an object be placed in front of a convex lens to get a real to get real image of the size of the object ?

    Where should an object be placed in order of to use a convex lens as a magnifying glass?

    At what distance should an object be placed from a convex lens of focal langth 15 cm to obtain an image three times the size of the object ?

    An object is placed …………. Of a convex lens to get a real image with the size of the object.

    Home
    Profile