You have three opaque strips with tiny holes of different shapes. If you obtain an image of the sun on a wall through these holes, the images are in [[1]] shape.

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Detailed Solution

You have three opaque strips with tiny holes of different shapes. If you obtain an image of the sun on a wall through these holes, the images are in a circular shape.
Due to the holes in the strips work as a pinhole camera and the strips are opaque, all three objects will provide the same type of image of the sun regardless of their shape. The same small circular image of the sun will be obtained in all three cases because the small holes in the strips, regardless of their shape, will operate as a pinhole camera. Furthermore, because light goes in a straight path, the image of the sun will be the same in all circumstances.[32]

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