Question

One half a convex lens of focal length 20 cm is covered with a black paper.

(i)Will the lens produce a complete image of the object?

(ii)Show the formation of image of an object placed at 2F1 of such covered lens with the

help of a ray diagram.

(iii)How will the intensity of the image formed by half-covered lens compare with non-

covered lens?​

Answer 1

Answer:

Even if half of the convex lens is covered with a black sheet of paper, the lens will produce a complete image of the object. However, the intensity of the image will be less and the image formed will be less bright as compared to the one formed by a complete convex lens.

Explanation:

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