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An Intiative by Sri Chaitanya
a
The area of the image is πr2 and it is directly proportional to f
b
The area of the image is πr2 and it is directly proportional to f 2
c
The intensity of the image will increase if f is increased
d
If the lower half of the lens is covered with black paper, the area of the image will become half
answer is B.
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