Two children argued about the meaning of Japan.

When Confucius traveled eastward, he saw two children arguing and asked them why.

A child said, "I think the sun is close to the sky at sunrise and far from the sky at noon." . "

A Confucius said, "I am far away at the beginning of the day, and I am near in Japan."

A son said, "The sunrise is as big as a car cover. In Japan and China, it is like a plate: a container for things, a round plate and a square bowl. Isn't this for the far small and the near big? "

Another child said, "The sun just came out to cool down, and it was as hot as putting your hand in hot water at noon. Isn't that why you feel hot when you are near and cool when you are far away?" ? "

Hearing this, Confucius could not judge who was right or wrong. The two children smiled and said to Confucius, "Who said you were smart?" ? "

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translate

When Confucius traveled eastward, he saw two children arguing and asked them what they were arguing about.

A child said, "I think the sun is close to people when it first comes out, and far away from people at noon."

A child said, "I think the sun is far when it first comes out and near at noon."

A child said, "When the sun first came out, it was as big as the roof of a carriage." By noon, it's as big as a plate, isn't it far (it looks)

Small and close (looks) big? "

(Another) A child said, "It's cool as soon as the sun comes out, and it's like entering a bathhouse at noon. Isn't that as close as possible? "

The hotter, the farther away. Is it getting cold? "

Confucius can't decide (who is right and who is wrong). Two children laughed at Confucius and said, "Who says you know much?"

Word translation

Therefore; cause

Soup: Hot water.

Decide: decide

Take it: think about it.

Go: Distance

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impression

Confucius is really a saint: he dares to admit his ignorance. Generally, a highly praised person can hardly be like him. In this case,

Most of them care about him to cover up their ignorance. The grace of a saint is indeed worthy of our eternal admiration and admiration!

I don't know how many people don't know the correct answer to the two-child question today: the angle of the sun shining on the earth should be considered.

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truth of science

One view is that there are clouds on the surface of the earth in the morning, and the sun looks big through the clouds. At noon, when the clouds cleared, the sun looked small, but the size of the sun did not change.

There is also a view that the sun looks big because its height is different and its atmospheric refractive index is different. In the morning, the sun has a low altitude angle and a high refractive index.

Another view is that due to the illusion of the eyes, it seems that the sun in the morning is bigger than that at noon. The white figure we see is bigger than the black figure of the same size. This is called photodegradation in physics. When the sun rises, the surrounding sky is dark, so the sun appears bright, and at noon, the surrounding sky is bright. In contrast, the brightness difference between the sun and the background is not so big, which is why we look like the sun is bigger in the morning than at noon. In short, the sun is the same distance from us in the morning and at noon, so its size is the same.

Also, it is hotter at noon than in the morning, is it because the sun is closer to us at noon than in the morning? Not exactly. Why is this?

It is hotter at noon than in the morning because the sun shines directly on the ground at noon and obliquely on the ground in the morning. It can be seen that when the sun is in direct sunlight, the ground and the air receive more solar radiation heat at the same time and in the same area than when the sun is oblique in the morning, so they are heated the most. So it is hotter at noon than in the morning.

In fact, the hot and cold weather mainly depends on the temperature. The main factor affecting the temperature is determined by the radiation intensity of the sun, but solar photothermal is not the main reason for directly raising the temperature. Because the direct absorption of sunlight by air is only a small part of the total solar radiation, most of it is absorbed by the ground. After the ground absorbs the solar radiation heat, it is conducted upward to the air through radiation, convection and other heat transfer methods, which is the main reason for the temperature rise.

In short, it is not because the sun is far from our ground that it is hot at noon and cold in the morning every day.

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originate from

From Liezi Tang Wen