In ancient times, people called "annular eclipse" as "Tiangou food day". "Sun" stands for Heaven Emperor, who is the son of heaven. If there is a solar eclipse, it is a bad sign. Uber violates the emperor's rules. Li believes that the occurrence of the solar eclipse is a manifestation of the emperor's loss of virtue and the traitor's rise to power in the Tang Dynasty's "Pushing the Cup". Generally speaking, the total solar eclipse should be remembered as the demise of the country, the chaos of the world, the fall of cities and the loss of territory.
In the eyes of the ancients, the solar eclipse not only symbolizes bad luck, but also is very unlucky. "Poetry Xiaoya at the Turn of October" wrote: "At the turn of October, the sun is shining high, and there is food every day, which is also ugly." Ugly people are evil and fierce; Even Confucius.
Poem Xiaoya Luming Literature: "I have a guest, De Yin Kong Zhao." Zheng Zhu said, "Confucius, He, Zhao and Ming Ye." Therefore, as early as in the Book of Songs, the solar eclipse has been regarded as a very unlucky symbol.
Among the various visions displayed in the sky, the solar eclipse is the most serious, that is, the so-called "the old gentleman is beyond the sky, and the change of the sky is beyond the solar eclipse" quoted in the Five Elements of the Later Han Dynasty. So once there is a solar eclipse, it means that the emperor's behavior is improper.
In this regard, the ancients had a lot of discussions. For example, in the Spring and Autumn Period, A Jin scholar Bo Xian thought that the solar eclipse was called "bad politics". Without politics and goodness, a country will bring disaster to itself. Zuo Zhuan and Zhao Gong's Seven Years. The so-called poor governance, of course, refers to the rulers. The monarch is the greatest ruler, so the eclipse can of course be considered as the monarch's fault.
Ancient people once had a solar eclipse, and there were many ceremonies to pray for peace and the early end of the eclipse. In China, whenever a solar eclipse occurs, people always beat gongs and drums to pray for the sun to appear. At this time, the court will also take action.
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Watching solar eclipses (partial solar eclipse, annular solar eclipse and total solar eclipse) requires professional observation tools to protect the safety of human eyes. Its core part is the lens, which must be a professional dimming film. There are metal films, polycarbonate, polyester fiber films and other materials. The ideal large transmittance of solar dimmer is 0.0032% (3/ 100000), which can effectively filter ultraviolet and infrared rays.
Don't directly observe the solar eclipse with naked eyes, please wear special solar observation filter.
I don't like forcing R to look at the reflection in the pond and the food. In water, the sunlight is only slightly dim, but it will still cause three major injuries to your eyes.
Don't use discs or color negative as filters. Optical disc and color negative have extremely low dimming rate for infrared part, which will cause permanent damage to eyes.
In the phase of partial solar eclipse, it is very dangerous to observe directly through binoculars, telescopes or even camera viewfinder, so Tian Miao's filter is needed for visual observation and photography.
Although there is no nerve in the retina, permanent vision damage caused by improper observation may be discovered after several hours!
Even if 99% of one side is blocked by strong light, it is dangerous to observe directly!
Sunglasses can't effectively block the wave band that will hurt your eyes!
If the projection measurement is partial eclipse, the surface of the projection screen must be rough.
If you have a viewfinder, don't forget to add a filter.