Physics
In each of the following cases, where must an object be placed in front of a convex lens so that the image formed is,
(a) at infinity,
(b) of same size as the object,
(c) inverted and enlarged,
(d) upright and enlarged?
Refraction Lens
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Answer
(a) In order to form the image at infinity, the object should be placed at focus, in front of a convex lens.
(b) In order to form the image of same size as the object, the object should be placed at 2F, in front of a convex lens.
(c) In order to form an inverted and enlarged image, the object should be placed between F and 2F, in front of a convex lens.
(d) In order to form an upright and enlarged image, the object should be placed between optical centre and focus, in front of a convex lens.
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