Arun has three opaque strips with very small holes of different shapes. In which of the following strips, the image of the sun obtained on the screen is circular?

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All will form a circular shaped image.

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Solution

The correct option is D All will form a circular shaped image.
A pinhole camera is a special kind of camera having a pinhole-sized opening to focus all light rays within the smallest possible area to obtain an inverted image as clear as possible.

All three strips will form the same kind of image of the sun irrespective of their shapes as the holes in the strips work as a pinhole camera and the strips are opaque.

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