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Questions  

If the central portion of a convex lens is wrapped with black paper symmetrically about its principal axis, then

a
No image will be formed by the remaining portion of the lens.
b
The full image will be formed but it will be less bright.
c
The central portion of the image will be missing.
d
There will be two images each produced by one of the exposed portion of the lens.

detailed solution

Correct option is B

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

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