On the night of June 26, friends in Chang'an District, Shijiazhuang, if they happen to go out to enjoy the cool air, they may see a very shocking phenomenon in the night sky. In the sky, a huge "hanging" Dark red shadow, this shadow is not only huge in area, but also has very neat edges, as if it were artificially carved. Around the shadow, that is, outside the straight edges, the tone suddenly brightens, which just brings out the shape of the shadow, making people scream magical.
Moreover, for a long time, the position of this shadow has not changed much, and the color tone has not changed much. It feels like it is "fixed" in the sky. We have often seen descriptions of UFOs on the Internet before, especially the recent investigation report on the UFO phenomenon published in the United States. The UFOs mentioned in it all have some similar characteristics, such as abnormal brightness and moving speed. It's fast, the acceleration is beyond imagination, etc. It's impossible to stay still for a long time. The giant shadow that appeared in the night sky in Shijiazhuang this time is very reluctant to be connected with UFO.
Since it is an event related to light that appears in the night sky, its cause can also be explained from the transmission of light. There are several possible factors involved here. One is a combination of special objects into a specific shape in the night sky, and the difference in the degree of light reflection with the surrounding atmosphere, which is captured by the human eye. For example, the "changing coil" that appeared in the sky somewhere in Europe and the black coil that appeared in the sky over Chengdu are all smoke rings ejected by relevant facilities on the ground. Under the influence of the "Bernoulli" principle, they gradually rise into the air. , and maintain the corresponding smoke ring shape, and it is still changing all the time.
Of course, there are also some special phenomena in the sky, which are images formed by some gathered insects and birds. These are common around the world.
The second possibility is that the clouds reflect or scatter some light rays from the ground with high "efficiency". When these reflected or scattered light enter the human eyes, it will form an illusion, making it feel like the sky. These phenomena are directly demonstrated in . For example, the bright triangle that appeared in the sky in Shanghai was caused by the light reflected from the top of a triangular prism-shaped high-rise building, which hit the clouds high in the sky.
For another example, a huge halo has appeared in the night sky in Beijing before. The final investigation result was that it was formed by the light projected upward from the bird's nest.
For example, the blood-red sky that appeared over Zhoushan, Zhejiang this time was caused by the red light emitted by fishing boats at night and scattered by the atmosphere.
The third possibility is that light from outside the earth enters the earth's atmosphere. Due to the different density of the atmosphere at different heights and the large number of water vapor molecules or tiny ice crystals contained in the air, when light of different wavelengths passes through These water vapor molecules or ice crystals will convert from composite light into an orderly arrangement of monochromatic light in a certain order, thus displaying various and colorful optical phenomena in the air. For example, rainbows, halo , light beams, etc., although the principles are slightly different, they can all be roughly classified into this category of reasons.
Judging from the characteristics of the giant shadow that appears in the night sky of Shijiazhuang, it is very similar to the regular light phenomenon that appears in the night sky of Shanghai and Beijing. Therefore, it is very likely that the light emitted or reflected from a building below is projected onto the clouds in the night sky, which is equivalent to the thick clouds acting as a natural "projection curtain." The light projected or reflected by the building can basically be a darker red tone.
In addition to the above mentioned, there are also some relatively rare atmospheric optical phenomena, such as the "mirage" that often appears in coastal areas in recent years. The principle of its generation is that the original scene of the mirage, the reflected light, in When passing through the atmosphere of different densities, a certain degree of refraction is caused, and then reappears over the farther distance.
For another example, not long ago in the Surima area of Tibet, rare " red elf " lightning appeared in the night sky. This was due to thunderstorm clouds producing a strong electromagnetic effect when strong lightning occurred. Then the electromagnetic effect continues to develop toward high altitudes, and eventually a sudden change in the atmospheric electric field is formed in the upper part of the thunderstorm cloud. This red lightning is formed when the molecules of nitrogen in the atmosphere are less excited by energy. If the nitrogen molecules are excited to a greater extent, blue elf lightning, which is harder to see, can also form.
Of course, there is also an aurora phenomenon often seen in high latitudes. This phenomenon is different from the above mentioned. The fundamental reason is that the huge flow of high-energy charged particles from the sun, after reaching the sky above the earth, is affected by Guided by the earth's magnetic field , it continues to gather in the polar regions of the earth, and then collides with the upper atmosphere molecules, causing the atmospheric molecules to undergo strong ionization, thereby emitting light of different colors, presenting a colorful and magnificent scene.
There are many phenomena that occur in the sky. Although the causes and mechanisms are different, through our serious, scientific, and thorough analysis, we can basically discover the truth hidden behind it. This is also what nature presents to humans. A great fortune.
