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3.Draw the ray diagram showing the image formation by a concave lens when an object is placed
(a) at focus of lens
(b) between focus and twice the focal length of lens
(c) beyond twice the focal length of lens.
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Given that,
Draw the ray diagram showing the image formation by a concave lens
(a). When an object is placed at focus of lens
Then, The image formed at infinity
The image formed is virtual, erect, diminished in size.
(b). When an object is placed between focus and twice the focal length of lens
Then, The image is formed between center of curvature and focal length.
The image formed is virtual, erect, diminished in size
(c). When an object is placed beyond twice the focal length of lens.
Then, The image is formed between center of curvature and focal length.
The image formed is virtual, erect, diminished in size
Hence, This is required answer.
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