Sunlight through a small square hole irradiates to the light screen behind the hole, and a spot appears. The shape of the spot is () A. Rectangle B. square C. circle D. triangle

Because the sun is very far away from the ground, and the small hole is very small, which meets the conditions of small hole imaging. When the sunlight propagates along a straight line through the small hole, it will form the image of the sun (circular), that is, the spot on the ground we see. The small hole is like an inverted real image, which is the same as the shape of the object, but has nothing to do with the shape of the small hole

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1. If the sunlight passes through a small square hole between leaves and a spot appears on the ground behind the hole, what is the shape of the spot?
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