Physics
Give two characteristics of the image formed by a concave lens.
Refraction Lens
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Answer
A concave lens diverges the rays incident on it, and so the image formed by a concave lens is always virtual and diminished.
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Can a concave lens form an image of size two times that of the object? Give reason?
Give two characteristics of the virtual image formed by a convex lens.
Complete the following sentences —
(a) An object is placed at a distance of more than 40 cm from a convex lens of focal length 20 cm. The image formed is real, inverted and ……………
(b) An object is placed at a distance 2f from a convex lens of focal length f. The size of the image formed is …………… that of the object.
(c) An object is placed at a distance 5 cm from a convex lens of focal length 10 cm. The image formed is virtual, upright and ……………
(a) Name the lens which always forms an erect and virtual image.
(b) State whether the image in part (a) is magnified or diminished?