Science
At what distance from a convex lens should an object be placed to get an image of the same size as that of the object on a screen?
options
- Beyond twice the focal length of the lens.
- At the principal focus of the lens.
- At twice the focal length of the lens.
- Between the optical centre of the lens and its principal focus.
Refraction Lens
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Answer
At twice the focal length of the lens.
Reason — When an object is placed at a distance equal to twice the focal length (2f) from a convex lens, the image formed is real, inverted and of the same size as the object.
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