In fact, when he heard about this ghost army, he thought it was ridiculous. If the people from the Western Regions were really able to exorcise ghosts, they would have annexed the Longyan Dynasty long ago.
so.
This is what I think!
The legendary ghost army that comes out of the ghost city from time to time is simply deceiving.
Liu Zheng could explain it using the scientific knowledge of later generations.
Those are a bunch of guys who make good use of mirages!
A natural phenomenon that takes advantage of the unique geographical environment and temperature. Mirage often appears at sea and in the desert.
It is the result of the refraction of light in air layers with different densities in the straight upward direction. There are many types of mirages. According to the position of their appearance relative to the original object, they can be divided into superior mirages, inferior mirages and lateral mirages; according to their location
The symmetrical relationship with the original object can be divided into positive mirage, lateral mirage, forward mirage and reverse mirage; according to the color, it can be divided into chromatic mirage and achromatic mirage, etc.
Since ancient times, mirages have attracted the attention of the world. In Western mythology, mirages are described as the incarnation of the devil and a bad omen of death and misfortune. In ancient my country, mirages were regarded as fairyland. Qin Shi Huang and Emperor Wu of Han once led people He went to Penglai to search for fairyland, and also sent people to Penglai many times to search for panacea. Modern science has correctly explained most mirages. It is believed that mirages are virtual images formed by light reflected by objects on the earth and refracted by the atmosphere. The so-called mirage is Optical illusion.
Mirages are closely related to geographical location, geophysical conditions and the meteorological characteristics of those places at a specific time. The abnormal distribution of temperature is the meteorological condition for the formation of most mirages. Desert Mirage Desert Mirage.
Take the formation of mirages as an example. In the summer, the sun is blazing in the desert, and the sand is scorched. Because the specific heat of the sand is small, the temperature rises very quickly. The temperature of the lower air near the sand rises very high, while the temperature of the upper air remains still.
It is very low, which results in an abnormal distribution of air temperature. Due to thermal expansion and contraction, the hot air in the lower layer close to the sand has a low density and the cold air in the upper layer has a high density. In this way, the refractive index of the air is small in the lower layer and large in the upper layer.
When the light reflected from a taller object in the distance is continuously refracted from the denser air in the upper layer into the sparser air in the lower layer, its incident angle gradually increases, and total reflection occurs when it increases to equal the critical angle. At this time, if a person walks backwards
If you look at the reflected light, you will see a mirage.
The "mirage" that occurs in the desert is the refraction phenomenon caused by sunlight encountering air of different densities. In the desert, during the day, the sand and rocks are baked by the sun, and the temperature on the surface of the sand layer rises rapidly. Due to the poor heat transfer performance of the air,
, when there is no wind, the vertical temperature difference over the desert is very significant. It is hot at the bottom and cold at the top. The air density in the upper layer is high and the air density in the lower layer is low. When sunlight enters the air layer with low density from the high-density air layer, the angle of the light
Changes have occurred, and through the refraction of light, the oasis in the distance appears before people's eyes.
Liu Zheng tried his best to teach these theories to several people in concise and concise words.
Who wants to...
They were still confused.
Jiang Xuan blinked: "Brother, do you mean that this ghost army was deliberately created by someone?"
Liu Zheng smiled and said: "Yes!"
He continued: "I think there are two possibilities. First, this is an army stationed in a specific place for a long time... They built a similar place somewhere outside this desert.
The ghost city will often appear in the eyes of passers-by as a mirage."
Everyone looked at each other in shock.
Although Qingyang Shuo was far-sighted, he didn't know much about the technology of later generations. He asked out of curiosity: "Sir, can this kind of mirage be created artificially?"
Liu Zheng smiled and said: "So, this person must be a genius of the world! He should not only use astronomy and geography, but also have other exquisite layouts, and this ghost city is just one of them!"
Qingyang Shuo also took a deep breath and said with a wry smile: "No wonder Xie Tianyao's 500,000-strong army was completely annihilated. People who don't understand this will be really scared to death."
Liu Zheng laughed loudly: "If this is just the reason for the destruction of the Holy Lord's army of 500,000, then we can conquer the Western Region!"
Everyone's morale was greatly boosted upon hearing this.
At this moment, Liu Zheng suddenly said excitedly, pointing with one finger at the desert hills not far in front of the cement: "Look, mirage, mirage!"
No one expected it.
What a coincidence.
As soon as Liu Zheng mentioned the mirage, the mirage appeared.
I saw the place where the desert sky and the earth meet, a vast expanse of twilight, and above the layers of clouds, various buildings, pagodas, temples, streets...
Although not clear, it is clear.
Everyone was stunned.
Liu Zheng was also very excited. In fact, the probability of a mirage appearing is very low. There are many conditions that need to be met. It is an eye-opener for God to encounter it on the road this time. If the 500,000-strong army of the Longyan Dynasty could have
If I had encountered this mirage earlier, I'm afraid it wouldn't have been such a miserable defeat.
Jiang Xuan ordered the entire army to stand still and watch the mirage.
In fact, in ancient rumors, this mirage was an ominous sign, foreshadowing death. But after Liu Zheng’s explanation today, everyone understood that being able to figure out what the mirage was in advance would be a good way to encounter the ghost in the future.
As far as the army is concerned, it has a better chance of winning.
Liu Zheng also smiled and said: "Loulan is not far away."
Everyone was overjoyed when they heard this.
They have been walking on the cement road for three days. It seems that they will reach Loulan in three days. Liu Zheng's journey was a bit incredible. The speed of paving the cement road during this thousand-mile journey was so fast. It only took about five people.
A month has passed and about half of it has been paved.
The labor force of the ancient people cannot be underestimated.