Seeing the giant light pillar this time, it is easy to think of the giant light pillar incident in 2021, which also appeared in Shenyang. At that time, you could still see a structure similar to steps on the light pillar, and some people even called it a "ladder to heaven." A year later, two light pillars appeared in Shenyang. Is there any connection between them?
In daily life, whether it is sunlight or artificial light, we cannot see the "shape" of light. But if there is dust or fog in the air, and light passes through such air, a bright light path will be produced. This phenomenon is called the Tyndall effect.
Light propagates along straight lines in a vacuum, and in the air, light also propagates along straight lines. But if there are many special sol particles suspended in the air, their diameters are smaller than the wavelength of visible light, but not much smaller, when the light travels through such air, it will be strongly scattered in all directions by these colloidal particles, so we You will see the light pillar phenomenon.
If the air is very clean, without various suspended particle impurities, there are only gas molecules, and when light passes through it, no light pillar will be formed. If an astronaut shines a laser beam into the distance in space, the astronaut will not be able to see the light beam no matter which direction he looks from.
The Tyndall effect is relatively common in life. Dust and liquid droplets in the air can become colloidal particles that scatter light. So, are these two light column phenomena related to this phenomenon?
As for the causes of these two light beams, we must first figure out where the light source comes from. It was morning when the incident occurred, and since it was suspended in the sky, the light source was most likely the sun. So, is the brightest area of this light column the sun itself?
The last time the light pillar phenomenon occurred, the direction of the light pillar was west, and it was morning and the sun appeared in the east, so the light pillar was not the sun. As for the direction where the light beam appeared this time, the video circulating on the Internet did not give it.
Although the light beam last time was not the sun, it was actually the reflection of the sun. In fact, the place where the light beam was located was a building whose exterior was covered with glass curtain walls. The sunlight from the east side shines through and is strongly emitted by the glass, forming a dazzling light.
In addition, the fog was relatively heavy that day, and the whole building was shrouded in the fog, looming. As a result, under the irradiation of sunlight, the Tyndall effect occurred, so strange light pillars appeared. When most of the fog dissipates, we can see what is going on:
It can be seen that the building has completely revealed its true appearance, with the dazzling sunlight reflected from the top. The layer-by-layer structure on the outer surface of the building looks like a ladder to the sky under the action of fog, light and shadow.
At that time, Shenyang meteorological experts believed that this was just a real natural phenomenon. The sun was above the light column. The clouds there were thin, and the sun's rays could be projected from above the clouds. Coupled with the effect of water vapor, the sunlight passing through it forms a giant light pillar. Although the expert's explanation is not entirely correct. The top of the light column is not the sun, but the sun reflected by the building, but this is indeed just a real celestial phenomenon.
The giant light pillar that appeared in Sujiatun this time has a similar principle. Although it was unclear what the light pillar was at first, the picture that appeared later showed that it should also be a building, and it was also the effect of glass reflection. Coupled with the effect of water vapor in the air that day, a giant light pillar was formed:
As for the light pillar, It is not a mirage of or phenomenon. From the current point of view, it should not be the case. In large mirages, buildings or hills often appear. This time, only the light can be recognized, and there is no corresponding original scene nearby.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-