What is the formation of a rainbow? How is a rainbow formed?

What is the principle of rainbow formation?

How rainbows are formed.

01 A rainbow is formed by the sunlight hitting a small water droplet in the air that is almost round, causing dispersion and reflection. When sunlight hits water droplets, it will be reflected at different angles, and it will also be reflected at different angles within the water droplets, with the reflection being strongest at 40 to 42 degrees. To cause this reflection, sunlight enters the water droplet and is refracted once, then reflected on the back of the water droplet, and refracted again when it leaves the water droplet.

Water has a dispersive effect on light, so blue light is refracted at a greater angle than red light, and the spectrum seen by the observer is also reversed, so that a rainbow is formed.

Rainbow, also known as "rainbow", or "rainbow" for short, is an optical phenomenon in meteorology. When sunlight hits water droplets in the air, the light rays are refracted and reflected, forming an arched multicolored spectrum in the sky, which is common after rain. Usually seen by the naked eye is arched, bridge-like, often called "rainbow bridge".

In fact, sunlight is a polychromatic light that is made up of seven colors. After entering the prism or water droplets, due to the different refractive indices of various colors of light, the propagation direction of various colors of light has different degrees of deflection, so they disperse when they leave, this phenomenon is called "dispersion". The smaller the wavelength, the greater the refractive index, so the refractive index of violet light is large and the refractive index of red light is small.

The seven colors of the rainbow are, from the outside to the inside: red, orange, yellow, green, blue, indigo, and violet.

The reason why rainbows are all curved is also related to the degree to which light bends as it passes through water droplets and the color of the light. Red light has the most curvature and violet light has the least curvature, so, the rainbow we often see, the blue is always below the red. If we are in the right position, we can see a round rainbow!

A rainbow is an optical phenomenon in meteorology. When sunlight hits raindrops in mid-air, the rays are refracted and reflected, forming an arched spectrum of colors across the sky. There are different theories about the seven colors of the rainbow, and the most common one in China is (from the outside to the inside).

Red, orange, yellow, green, cyan, blue, purple. The Western sayings are: red, orange, yellow, green, blue, indigo, and violet, which are named after the scientist Newton decomposed the seven primary colors.

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. Rainbows are most common in the afternoon, when the weather clears after the rain. At this time, the air is less dusty and full of small water droplets, and one 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 are often seen is near waterfalls. Splashing water or spraying water mist in the air with your back to the sun on a sunny day can also artificially create a rainbow.

Evening rainbow is a rare phenomenon that can occur at night when the moonlight is strong. Because it is difficult for human vision to distinguish colors in low light at night, the evening rainbow appears to be completely white.

A rainbow is caused by the reflection and refraction of light from sunlight into water droplets in the air.

We know that when sunlight passes through the prism, the direction of travel is deflected, and the original white light is broken down into bands of red, orange, yellow, green, blue, indigo, and violet.

When it rains, or after rain, the air is filled with countless tiny droplets that can deflect the sun. When sunlight passes through water droplets, it not only changes the direction of travel, but is also decomposed into red, orange, yellow, green, blue, indigo, violet and other colors. If the angle is right, it becomes the rainbow we see.

Rainbow is an atmospheric phenomenon in which a large amount of water vapor is enriched in the air, and the sunlight shines at a small angle at a small angle, and the sunlight shines on the small water droplets in the water vapor to refract colorful bands. In fact, there are two types of rainbows, one kind of rainbow with a shorter radius is red on the inside, and the outer side with a longer radius is purple, which is the "rainbow".

There is also a rainbow that should actually be called a "neon", with the inner side of the shorter radius being purple and the outer side of the longer radius being red. Rainbow and neon sometimes coexist, and sometimes there is only rainbow and no neon. Neon and rainbow are rainbow phenomena formed by sunlight being refracted and reflected by small water droplets.

After rain, the air contains a large number of small water droplets, like a prism, which causes the sunlight to disperse.

Rainbow formation is formed by the refraction of light.

Rainbows are formed by the irradiation of water in the atmosphere by the sun.

It's very simple, because the small water droplets in the air are refracted by the sun's rays to form white, because the wavelengths of these seven colors are relatively long, so we only see these seven colors, in fact, there are many colors, but what we see is semicircular, in fact it is circular, please adopt, thank you!