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A lens is placed between a source of light and a wall. It forms images of area A1 and A2 on the wall for its two different positions. The area of the source of light is
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- √A1 A2
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A1 + A2 2 -
A1 - A2 2 -
1 + 1 A1 A2
Correct Option: A
Size of images = A1 and A2. From the displacement method, the area of the source of light = √A1 A2 .
