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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?
Or the shape of the sun -- circle
What are the shapes of leaves
Oval: oval in shape, the widest in the middle, and round at the tip and base, such as the leaves of camphor tree, rubber tree, rhinoceros, tea tree, black jujube tree and cherry grass, Leaflets.\x04\x03 like:.\x04\x03, three leaves or five cracks, forming a deep cut, and full form, such as cotton, castor, grape, maple and Wutong, with fan-shaped leaves: fan shaped like folding fan, with a broad and round top and a narrowing to the base, such as ginkgo leaves,.\x04\x03 rhombus: leaves with equal sides, such as rhombus and Sapium,.\x04\x03 lanceolate: also called gunlike, with broad base. If the leaf of peach, willow and bamboo is inverted lanceolate, it is called inverted lanceolate, such as the leaf of small tiller. Ovate: shaped like chicken egg, the lower part is round and wide, and the upper part is slightly narrow, such as the leaf of mulberry, sunflower and peanut. If it is inverted ovate, it is called inverted ovate, such as the leaf of Magnolia and peanut, The leaves of Eclipta prostrata are needle shaped, such as the leaves of Pinus tabulaeformis, Pinus massoniana, Pinus bungeana and cactus. Scale shaped, such as scales, such as the leaves of Platycladus orientalis. Spoon shaped, such as spoon shaped, with rounded apex, gradually narrowed to the base, such as the leaves of cabbage and Plantago. Triangle shaped, such as the leaves of buckwheat, with flat base and nearly equal three sides
In the case of partial solar eclipse, is the spot of sunlight shining through the cracks of leaves still round?
Under normal circumstances, the spot of sunlight shining on the earth through the cracks of leaves is round. Why? In the case of partial eclipse, will this phenomenon change?
According to the principle of pinhole imaging, we know that the spot on the earth is actually the image of the sun. In the case of partial solar eclipse, the sun is blocked by the moon, and the image will naturally change
RELATED INFORMATIONS
- 1. When the phenomenon of partial eclipse occurs, the moon covers half of the sun. At this time, through the dense leaves, what is the spot on the ground? Why? one hundred and eleven
- 2. Why is the light spot in the shade of a tree round during a partial solar eclipse? Explanation by light propagating along a straight line This is a question in Grade 8 science of Shanghai Education Press. The answer is round light spot. I can't understand it all the time
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- 8. What phase is the moon in the middle of the sun and the earth, and what phase is the arrangement of the sun and the earth
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- 10. The relationship between the earth, the moon and the sun, how they work, how time is counted,
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- 12. How to form a round light spot in the shade of a tree in the sun is explored. It is found that the light spot is formed by the sun through a small hole. It is also found that the image has size and which factors are related to the size of the image eleven
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- 18. Why is the moon's orbit around the earth elliptical?
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- 20. If there is a planet whose average distance from the sun is 8 times of that from the earth to the sun, then the cycle of the planet around the sun is What is the revolution period of the earth