Spring equinox is one of the 24 solar terms. It is the same length of day and night. The temperature rises again, and spring comes into northern China. There are many folk customs on the day of the spring equinox, including egg erecting. Why does it happen? What's the saying of egg erecting on the spring equinox? Let's have a look with Xiaobian.
On the scientific principle of erecting eggs at the spring equinox
Spring equinox is one of the 24 solar terms in China. Every year, tens of millions of people around the world are doing the experiment of "egg erecting". I don't know why eggs stand up very easily at the spring equinox every year. It is difficult to find out how this play, known as' Chinese custom ', can become a' world game '.
It's easy and interesting to play "egg standing": choose a smooth and symmetrical fresh egg that has just been born for four or five days, and set it up on the table lightly. Although there are many losers, there are many winners. Spring is divided into the best time of egg games, so there is a saying that 'the equinox comes, the egg is pretty'. The egg that stands up is not beautiful.
Why are eggs easy to stand up on the day of vernal equinox? Although there are many theories, the scientific truth is not long. First of all, the vernal equinox is the same day and night in the northern and southern hemispheres. The earth's earth axis with an inclination of 66-50 is in a relative balance state of force with the earth's orbit plane around the sun, which is conducive to egg erection.
The scientific principle of erecting eggs at the spring equinox
Secondly, the spring equinox is in the middle of the spring, not cold or hot, red flowers and green grass, comfortable people, quick thinking, quick action, easy to stand eggs successfully.
What's more, the surface of eggs is uneven, with many protruding & lsquo; Hills'. The height of 'mountain' is about 0.03mm, and the distance between 'mountains' is between 0.5mm and 0.8mm. According to the principle that three points form a triangle and determine a plane, as long as three 'Hills' and a triangle composed of these three' Hills' are found, and the center of gravity line of the egg passes through the triangle, then the egg can stand up. In addition, it is better to choose the egg 4-5 days after birth, because the yolk band of the egg is loose, the yolk sinks, and the egg The weight of the egg is 100% lower, which is conducive to the erection of the egg.
The symmetrical and smooth curve of egg is the reason why it is difficult to stand up and the charm of it. A famous Renaissance painter in Europe, Da & middot Finch, used to practice drawing egg curves every day for more than two years, which laid a solid foundation for his later successful creation of the Mona Lisa's mysterious smile.
People in China call the face "face", and take the shape of the egg as the standard of whether the face is beautiful or not, which fully shows the Chinese people's superb level of aesthetic appreciation and the aesthetic attribute of the shape of the egg.
Today, the egg shaped cars, airships, bridges, tunnels, gymnasiums, concert halls and other buildings can be seen all over the world. They perfectly realize the combination of science and culture, science and art, science and aesthetics.
Perhaps, the popularity of these egg shaped objects and buildings is exactly the inspiration of the ancient Chinese vernal equinox 'egg standing' folk custom.