A double rainbow is a very rare sight, what is the difference between its formation and a normal rai

There is not much difference, a normal rainbow is a primary reflection, while a double rainbow is a secondary reflection.

The formation of a double rainbow is one more reflection than a single rainbow, and nothing else.

It seems to be through the periphery of the original rainbow that appears a slightly larger diameter and inverted colors.

The biggest difference is that there are two double rainbows, and one is normal.

Actually, it doesn't make a difference, but it comes through secondary reflection.

Personally, I think it's because the light is reflected twice in the water droplet, that's why it's like this.

Personally, I think there is still a big difference, and the colors will be a little better.

If the light is reflected twice within the water droplet, a second rainbow (neon) is produced

It was a concentric rainbow with a slightly larger diameter and reversed colors on the periphery of the original rainbow.

Double rainbow is a special phenomenon formed after two reflections in the water droplet, a concentric rainbow with a slightly larger diameter and inverted color appears on the periphery of the original rainbow, and the inner rainbow is called the main rainbow, the outer side is red, the inner side is blue, and the color is brighter; The outer rainbow is called a secondary rainbow, the outer side is blue, the inner side is red, the color is darker, and the shape resembles a headband.

Experiments show that the main rainbow of the rainbow is caused by the reflection in the water point, while the secondary rainbow is formed by two reflections. This is one of the "miracles" of nature. The corners are the brightest and the middle is the darkest.

So, how exactly did the double rainbow come about? Why do we see only one rainbow so often? Science and technology reporters interviewed Huang Zhimin, an agricultural meteorological expert in Hubei Province, and answered these questions one by one.

The double rainbow is actually neon and rainbow.

Huang Zhimin said that when the air humidity is high, the water vapor in the air can be seen as countless small water droplets. When sunlight hits a small water droplet, two refractions and one reflection occur, the phenomenon of "refraction-reflection-refraction".

Sunlight is composed of 7 colors: red, orange, yellow, green, blue, indigo, and violet, and the first refraction will occur when it hits the water droplets, and due to the different wavelengths of these 7 colors, their deflection angles will be different, and then the sunlight will be decomposed into 7 monochromatic lights; After the refracted monochromatic light reaches the back of the water droplet, it will be reflected according to the reflection law. The reflected monochromatic light will return to this side of the incident water droplet, at which point a second refraction will occur and the water droplet will still be emitted as monochromatic light.

The red light with the shortest wavelength has the smallest refractive index in the water droplets, so that its outgoing light and the incident light constitute the maximum angle, and the violet light with the shortest wavelength has the largest refractive index in the water droplets, so that the refracted light and the incident light constitute the minimum angle, and other lights are distributed in order in it.

When we see a "rainbow" in the sky, it means that the sunlight is refracted and reflected in the water droplets, which means the existence of "neon". The formation of neon is similar to that of the rainbow, except that the sunlight undergoes two refractions and two reflections in the water droplet, that is, "refraction-reflection-reflection-refraction", because there is one more reflection process than the formation of the rainbow, the red light with the smallest refractive index is at the minimum angle between the direction of the red light and the direction of incidence, and the violet light with the largest refractive index is the maximum angle between the direction of the violet light and the direction of incidence.

This phenomenon is very similar to the principle of rainbow formation, because some water droplets in the air will be scattered by light, so a rainbow will be formed, but the water droplets cannot scatter all the color of the sun, so they can only scatter white, and the sky will form a fog rainbow at this time.

This phenomenon is formed by the condensation of water droplets in nature, combined with the reflection of sunlight in the air, which is a natural phenomenon.

There are a large number of small water droplets in the air. These small water droplets are so small that they can't refract all the colors, and they form rainbows.

This phenomenon is formed by a physical reaction. So there will be such a situation.

Rainbow is also known as the sky bow, rainbow, colorful bridge, etc. Rainbow is a special optical phenomenon in meteorology, the sun's rays shine on the water droplets in the air, and after the light is refracted and reflected, it will form a colorful arch in the sky, and the arch presents seven colors from the outer circle to the inner circle: red, orange, yellow, green, blue, indigo, and purple.

1. More than seven colors: Strictly speaking, the rainbow does not only have seven colors, and there are many colors with subtle differences between the colors of the rainbow and the color layering, but for the sake of simplicity, it is generally said that the rainbow has seven colors.

2. The color of sunlight: The appearance of the rainbow also proves that sunlight actually has color, and after various refractions, sunlight is broken down into seven monochromes that can be directly seen by the human eye.

3. Scenes where rainbows often appear: Rainbows are more common in scenes after rain and sunny days, and usually in the afternoon when the light is particularly sufficient.

4. Special rainbows: Rainbows also have many special ways to appear, such as multiple rainbows, moon rainbows, etc. Among them, the moon rainbow will appear at night when the moonlight is strong, and because it is difficult for the naked eye to distinguish the color at night, the moon rainbow looks as if it is only white.

1. From the outer ring to the inner ring, it is red, orange, yellow, green, blue, indigo, purple, and wears eight colors.

2. Rainbow, also known as Tiangong (Hakka), rainbow, Jiang, etc., referred to as rainbow, is an optical phenomenon in meteorology, when the sunlight shines on the water droplets in mid-air, the light is refracted and reflected, forming an arched colorful spectrum in the sky, from the outer circle to the inner circle is red, orange, yellow, green, blue, indigo, purple Dai eight colors. In fact, there are countless colors of the rainbow, such as the dust friend, there are many subtle differences between red and orange, but for the sake of simplicity, only seven colors are used as a difference.

3. 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 may produce a rainbow phenomenon that can be observed, the rainbow is most often in the afternoon, just after the rain, when the sky is clear, when the air is less dusty and the nucleus is full of small water droplets, one side of the sky is darker because there are still rain clouds, and the observer's head or back has no cloud to cover and the sunlight can be seen, so that the rainbow will be easier to see.

1. To put it simply, the rainbow itself is circular, but since the lower part of the rainbow is not in our field of vision, the rainbows we usually see are semicircular.

2. The reason for the formation of the rainbow can be summarized by the mischievous frolic of light in the small water song beads. From a physical point of view, sunlight is refracted at the interface between air and water droplets, and then reflected inside the small water droplets, creating a rainbow.