An illuminated object is placed at a distance of 20 cm from a converging lens of focal length 15 cm. The image obtained on the screen is:

(a) upright and magnified
(b) inverted and magnified
(c) inverted and diminished
(d) upright and diminished

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Solution

(b) Inverted and magnified
For an object placed between the focal length and twice the focal length of a converging lens, the image formed is real, inverted and magnified.

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An object is placed at a distance 40 cm from a convex lens of focal length 20 cm. The image formed is:

An object AB is placed between 2F₁ and F₁ on the principal axis of a convex lens as shown in the diagram:

The image of the object formed by the lens is

10 c m

8 c m

15 c m

20 c m

25 c m .

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.

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