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About the science in "Two Children's Debate".
The sun is the same distance from the earth in the morning and at noon. Why does the sun look bigger in the morning than at noon? It's a visual error, an illusion.
The same object, placed in a group of objects larger than it, appears small, while placed in a group of objects smaller than it appears large. In the same way, the morning sun rises from the horizon against the backdrop of trees, houses, distant mountains and a small corner of the sky, and in this comparison, the sun appears larger. At noon, when the sun rises high and the vast sky is the backdrop, the sun appears smaller.
Secondly, the white part of the same object appears larger than the black one, and this physical phenomenon is called "photoosmosis". When the sun is rising, the background is a dark and dreary sky, and the sun is exceptionally bright; At noon, the background is a blue sky, and the sun does not contrast much with its brightness, so it appears smaller.
The temperature is higher at noon than in the morning, is the sun closer to us at this time than in the morning? Neither is it. The main reason is that the sun hits the earth obliquely in the morning and the sun shines directly on the earth at noon.
At the same time and in the same area, direct radiation is higher than oblique heat. At the same time, at night, the heat of the sun shining on the ground dissipates, so it feels cool in the morning; At noon, the heat of the sun hits the ground, so it feels hot. The temperature is hot or cold, and it does not indicate how far or near the sun is from the ground.
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Naturally, the sun is closer to us at noon, but the size of the sun has nothing to do with the temperature we feel and the difference between the distance we feel. It feels hotter at noon because the sun is direct to us compared to the morning sun, and the morning sun is more deflected. As for our distance from the sun, it is about a distance of the radius of the earth in the morning than at noon (I don't think I need to explain too much about this), so why is it so far away?
Because the sun we see is actually the projection of sunlight on the surface of the atmosphere, if the distance of its projection from us is the same, then the sun we see at any time is the same size, but in the morning the surface of the atmosphere is the projection of the sun is farther away from us, so it is larger, and the distance of this projection is very different from our distance in the morning and noon, so the difference in the size of the sun we see is very obvious.
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It is a geographical phenomenon, which is the rotation and revolution of the earth, and there is a difference between perihelion and aphelion, in fact, the distance between people and the sun is about the same.
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