Mention the kind of lens that can form 1) virutal, errect and magnified image 2)real, inverted and diminished image 3) virutal,errect and diminished image.

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Solution

(1)virtual erect and magnified image of an object is formed by a convex lens.
(2)There are six possibilities of position of object in the case of convex lens:

Object at infinity

Object beyond centre of curvature, C

Object at centre of curvature, C

Object between centre of curvature, C and principal focus, F

Object at principal focus, F

Object between principal focus, F and optical centre, O

(3) The convex mirror produces erect,virtual and diminished.

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What kind of lens can form : (a) an inverted magnified image ? (b) an erect magnified image ? (c) an inverted diminished image ? (d) an erect diminished image ?

Q. A student performs an experiment to estimate the focal length of a convex lens by obtaining the image of a distant window on a white screen. The image formed on the white screen is :
(1) virtual, erect and magnified
(2) real, erect and magnified
(3) real, inverted and diminished
(4) virtual, inverted and diminished

A concave lens forms the image of an object which is :

(a) virtual, inverted, and diminished

(b) virtual, upright, and diminished

(d) virtual, upright, and enlarged.

When an object is kept at any distance in front of a concave lens, the image formed is always : (a) virtual, erect and magnified (b) virtual, inverted and diminished. (c) virtual, erect and diminished (d) virtual, erect and same size as object

(a) Name the lens which always forms an erect and virtual image.

(b) State whether the image in part (a) is magnified or diminished.

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