Why do rainbows appear on sunny days, and why do rainbows appear on sunny days after rain?

Rainbows appear on sunny days because the air humidity is high, although we can't see the water mist with the naked eye, but the concentration of water mist in a certain range has reached the conditions for the formation of a rainbow, and the sunlight will form one or several rainbows after refraction. If you're interested, try it yourself – spray it in the sun with a watering pot and you'll see a small rainbow at the right angle.

The solar halo that surrounds the sun indicates that there is a condensed ice core in the high altitude, which may be windy. Lying on the horizon is a rainbow in the true sense of the word, usually caused by small droplets of liquid water in the low altitude after rain. The two of them have really never seen each other together.

Because usually after the rain, the high ice cores are carried to the ground with the rain. It may also be that the local low pressure caused the water vapor near the ground to evaporate and condense, forming water droplets in the air and creating a rainbow.

Just guessing. As for what it means ... It is estimated that it will not be windy and sunny after that, it should be windy and rainy.

This is because after a thunderstorm or shower, there are many small droplets of water floating in the air. These small water droplets are refracted and internally reflected by sunlight. Thus forming a rainbow.

The reflection of 40 to 42 degrees is the most intense, resulting in the rainbow we see. To cause this reflection, sunlight enters the water droplet, first refracts once, then reflects on the back of the droplet, and finally refracts again when it leaves the droplet, for a total of two refractions after one reflection.

In fact, as long as there are water droplets in the air and the sunlight is shining at a low angle behind the observer, it is possible to produce a rainbow phenomenon that can be observed, and the rainbow most often appears in the afternoon, when the sky is full of small droplets of dust after the rain, and the side of the sky is darker because there are still rain clouds.

The rainbow will be easier to see if the sun is visible without clouds above or behind the observer's head. Another place where rainbows can often be seen is near waterfalls, where artificial rainbows can also be created by sprinkling water or spraying water mist in the air with their backs to the sun on a clear day.

Why does a rainbow appear when the rain is clear and the sky is clear? First of all, the formation of a rainbow is the reflection of sunlight by fog. Due to the different refractive angles of various lights, the semicircular aperture is arranged in order, and the rain is formed by the fall of water vapor after the cold air rises.

Rain falls vertically, and the rainbow must be angled at a certain angle on the water vapor to be visible. It generally occurs in the high-pressure summer, when the sunny opposite sky is visible after the rain in the morning and evening. Rain and rainbow is a rain cloud that is not large and only at the top of the sky, so the phenomenon of rain and rainbow is formed, and you can see the rainbow in the sunlight when you spray it into the sky.

After the rain, semicircular rainbows often appear in the sky. It is a band of light consisting of red, orange, yellow, green, blue, indigo, and violet. We call it a rainbow.

Since the air is humid after the rain, there are many small suspended water droplets in the air. In the air, the sun is divided into different colors of light, forming a rainbow in the air that we can see. The principle of this phenomenon is called the prism dispersion principle, which belongs to the natural physical phenomenon.

After the rain, a large number of small water droplets are suspended in the air, and the small water droplets act as prisms.

For a small droplet, only one color light can be seen. Different colors of light have slightly different maxima, so the different colors of light that enter the human eye come from small water droplets in different arcs inside and out. Among them, according to the order of red, orange, yellow, green, indigo, and violet, the maximum value of each color light decreases in turn, with the red light being the largest and the violet light being the smallest.

So from the outer circle to the inner circle, the colors of the rainbow are red, orange, yellow, green, indigo, and purple, with the outermost ring being red and the innermost circle being purple. The rainbow is usually only a part of the upper part because it is blocked by the earth. If you happen to appear on an airplane, you will see that the rainbow is round.

The formation of a rainbow is a natural optical phenomenon. To put it simply, the rainbow we see after a storm is due to the sunlight shining into the air, close to the circle of small water droplets, which then causes the dispersion and reflection of light. When sunlight ingests water droplets, it will enter the point of rays from different angles, and small water droplets will also be reflected from different angles, and when the sun enters small water droplets, the interface between the water droplets and the air will be refracted and reflected, and a colored light band will be formed in the sky - rainbow.

When the rain passes and the sky is clear, the water vapor in the air will refract light, so a rainbow will appear.

The main reason is that when the rain has passed and the sky is clear, there are still small water droplets in the atmosphere, and when the sunlight hits the water droplets, the refraction phenomenon occurs, so the rainbow is produced.

Rainbows are created by the refraction of light, mainly because after rain, sunlight will come out when the sky is clear, and it will react with the air at this time to produce refraction.

Causes of rainbows after rain.

1. When it rains or after the rain, the air is filled with countless small water droplets that can deflect the sun, when the sunlight passes through the water droplets, it not only changes the direction of progress, but also is decomposed into red, orange, yellow, green, blue, indigo, purple and other colors, if the angle is appropriate, it becomes the rainbow we see.

2. The size of the water droplets in the air determines the brightness of the rainbow, the larger the water droplets, the brighter the rainbow, and the smaller the water droplets, the lighter the rainbow. In summer, there are often thunderstorms or showers, and the scope of these rains is not large, and it is often a day difference that rains here and there, and when the sun celebrates this light and shines on the small droplets that stay in the air after the rain, a beautiful rainbow appears.

3. Comparatively speaking, the air is dry in winter, there are few opportunities for rain, most of them are snowfall, and snowfall will not form rainbows, so there is no rainbow in winter. However, in rare cases, rainbows can occur when there are the right conditions in the sky for the formation of rainbows.

The presence of a rainbow on a sunny day does not mean anything, but is an atmospheric optical phenomenon.

Rainbows on sunny days are caused by the dispersion and reflection of small water droplets in the sky that are almost circular in the sky. When sunlight hits water droplets, it is reflected at different angles at the same time, and it is reflected at different angles, with the most intense reflection being 40 to 42 degrees, resulting in a rainbow visible to the naked eye.

Rainbow, also known as Tiangong (Hakka), rainbow, Jiang, etc., referred to as rainbow. When the sunlight hits the water droplets in mid-air, the light is refracted and reflected, forming an arched multicolored spectrum in the sky, which is red, orange, yellow, green, blue, indigo, and purple from the outer circle to the inner circle. In fact, the rainbow comes in an infinite number of colors, for example, there are many subtle colors between red and orange, but for the sake of simplicity, only seven colors are used as a difference.

Summary. Meteorological experts said that in spring and autumn, the temperature difference between high-altitude and low-altitude air is large, and water vapor will freeze at high altitude, making the density of high-altitude air more dense than that of low-altitude air, forming an "inverted prism".

When the sky is clear and there are few clouds, and the sunlight shines at a certain angle on this thin, curved surface Xiaoice crystal, forming a refraction, the inverted rainbow spectacle will appear. The appearance of this rainbow has nothing to do with rain and foggy weather.

Why is there a rainbow on a sunny day.

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Such a landscape occurs because the water particles at high altitude reach a certain density, and the sunlight is reflected and refracted to produce seven colors, which is the common rainbow.

Meteorological experts said that in spring and autumn, the temperature difference between high-altitude and low-altitude air is large, and water vapor will freeze at high altitude, making the density of high-altitude air more dense than that of low-altitude air, forming an "inverted prism". When the sky is clear and there are few clouds, and the sunlight shines at a certain angle on this thin, curved surface Xiaoice crystal, forming a refraction, the inverted rainbow spectacle will appear. The appearance of this rainbow has nothing to do with rain and foggy weather.

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