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Q.

If the central portion of a convex lens is wrapped in black paper as shown in the figure

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a

The central portion of the image will be missing

b

The full image will be formed but it will be less bright

c

There will be two images each produced by one of the exposed portions of the lens

d

No image will be formed by the remaining portion of the lens

answer is B.

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Detailed Solution

Since aperture of lens reduces so brightness will reduce but there will be no effect on size of image.

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