When does a mirage usually occur?

When it comes to mirages, the first thing that comes to mind is the desert. Some people have seen a mirage with their own eyes, and some people may not believe it yet. When I traveled to Yantai with my boyfriend in the late summer of this year, there was a mirage on Yangma Island, which was really very clear at that time, and the dark sky on my side was windy and rainy, which made people depressed.

The weather on the other side of the mirage was bright, like summer. Then it slowly blurred, knowing that at last it was impossible to see, as if it was hiding in the fog. The world is amazing.

After returning to the room, I did a mirage understanding. <>

A mirage is an optical refraction phenomenonTherefore, when the mirage appears, it is closely related to the geographical location and climate, and the climate changes with the seasons throughout the year. Let's find out today. The main factors for the occurrence of mirages are related to geographical location, geophysical location (i.e., landform), and real-time weather.

To put it simply, because the air flow above it is like a mirror. It's thin underneath, like a large mirror hanging in the sky, reflecting the scenery from a certain place in front of our eyes. Every year, China's Penglai appears in May and June, and in July and August on Long Island.

To say that it is most likely to appear in that season,The summer weather is the most likely time for mirages. Anomalies in temperatures are the meteorological conditions for the formation of most mirages. Everyone knows that "mirages" can occur in the desert, which is actually the refraction of sunlight when it meets air of different densities.

In the desert, there is a large temperature difference. During the day, the sand and gravel are scorched 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 difference in air temperature over the desert is very significant, the air density is very high, and the density of the air layer is low.

When sunlight enters the dense layer of air from the denser layer of air to the layer of less dense air, the angle of light changes, and through the refraction of light, a distant scene is presented to people. On the surface of the sea or river, this phenomenon of "mirage" sometimes occurs. <>

The occurrence of mirages is mainly related to geographical location, geophysical location (i.e., geomorphology), and weather. It doesn't have much to do with the season, but it usually doesn't happen much in winter, because the air flow must be as thick as a mirror. The bottom is thin.

It's like hanging a mirror in the sky, reflecting the scenery in the distance. Penglai in our country. It appears in May and June every year.

And July and August on Long Island. When it comes to seasonality, the weather in the summer is the most likely to produce mirages.

Mirages are generally loud along the coast and occasionally occur in desert areas. It is usually formed by water droplets in the summer air that refract distant scenes to near places, and is formed by strong sunlight.

Mirages generally occur around the spring and autumn seasons, because the weather and air currents at that time are more likely to reflect, and mirages can only appear in special terrain.

It generally occurs in summer, reflecting distant things, which is a natural phenomenon formed by the refraction of light, and occurs in places such as the surface of large rivers and the desert Gobi.

Mirages often occur in the summer.

The formation of a mirage is closely related to the weather situation, meteorological conditions, geographical location, geophysics, etc., and when the mirage appears, the meteorology will change significantly. According to the data analysis, the day before the "mirage" appeared, there was significant precipitation and cooling weather, and the temperature was generally significantly lower than the previous day.

"Mirages" often occur at sea, because the air humidity and thickness of the space within a certain range of the sea are relatively large, and such a large area of water vapor inadvertently forms a huge lens system under the movement of Lu Qi. When the temperature near the ground changes drastically, it will cause a huge difference in the density of the atmosphere, and the distant scenery will undergo abnormal refraction and total reflection when the light propagation, resulting in a mirage.

Effect of refractive index band on mirage

The occurrence of "mirage" is related to the refractive index of the air layer at different altitudes, and the water vapor content is an important meteorological factor that directly affects the refractive index. At the same time, there is also a certain relationship with the sudden change of temperature and relative humidity. The air near the surface of the sea has a higher refractive index due to the lower sea temperature and moist water vapour, while the air above is warmer due to the influence of sunlight.

The refractive index of the air layer above the sea surface gradually decreases from bottom to top with height, and the refractive index of light in the air also shows discontinuity due to the discontinuity of meteorological changes. When light passes through the top of the air layer with a large refractive index, it is easy to form a total reflection under the meteorological conditions of clear weather, no wind or breeze, thus creating a "mirage" spectacle.

The above content reference: Encyclopedia - Mirage.

There is no specific time for the mirage to appear, and the season of appearance is uncertain, and this main Vona depends on the climate of the place. For example, most of the mirages in the Penglai area appear in the months of each year, the mirages near Zimlensk in Russia often appear in spring, and the mirages in Alaska in the United States generally appear in the 20 days after June.

The duration of the mirage of the jujube is not certain, sometimes the lack of rock is not waiting for a few hours, as short as ten minutes, or even fleeting. The appearance of the mirage on March 19, 1957 in Huilai, Guangdong, disappeared from 1 p.m. to 6:45 p.m., which was the longest time in history.

Mirages are often produced in the sea and deserts, and mirages are the result of the refraction of light rays in layers of air with different densities in the direction of a straight line. Mirages are closely related to geographical location, geophysical conditions, and the meteorological characteristics of those places at a given time. The abnormal distribution of air temperature is the meteorological condition for the formation of most mirages.

Mirages generally appear in the summer. A mirage is an illusion formed by the refraction of distant objects due to a gradient of air temperature created by the sun when the ground temperature rises. Due to the different densities, light rays are refracted at the temperature gradient demarcation.

And in the summer, when it rains in most parts of the planet, combined with the intense sunlight in the summer, it creates a mirage.

Formation principle: Refraction of light: When light is obliquely reflected from one medium to another, the direction of propagation changes, so that the light is deflected at the junction of different media.

Understand: The refraction of light, like the reflection of light, occurs at the junction of the two mediums, except that the reflected light returns to the original medium, while the refracted light enters the other medium. Since light travels at different speeds in two different substances, the direction of propagation changes at the junction of the two mediums, which is the refraction of light.

Someone has used a device to project light from the water onto the interface between water and air, and you can see that the light is divided into two parts at this interface: one part is reflected into the water, and the other part is refracted into the air. If you turn the mirror in the water so that the light at the interface is more oblique, the refraction of the light in the air will be more severe.