Why rainbows often appear after rains in summer

Rainbows are caused by the dispersion and reflection of small water droplets in the sky that are nearly round when sunlight hits the sky. When sunlight hits a water droplet, it is incident at different angles at the same time, and it is reflected at different angles within the water droplet. 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 it once, then reflects off the back of the water droplet, and finally refracts it again when it leaves the droplet. Because water has a dispersive effect on light, the refractive index of light of different wavelengths is different, and the refractive angle of blue light is greater than that of red light. Because the light is reflected inside the water droplet, the observer sees the spectrum upside down, with red light at the top and other colors at the bottom.

In fact, as long as there are water droplets in the air and 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.

The visibility of a rainbow depends on the size of the small water droplets in the air, the larger the volume of the small water droplets, the brighter the rainbow formed, and the smaller the size of the small water droplets, the less obvious the rainbow formed. In winter, the temperature is low, small water droplets are not easy to exist in the air, and there are few opportunities for showers, so there are generally no rainbows in winter.

When it rains. Rain dripping down. Direct sunlight shines through small water droplets. Refracted into the atmosphere. Dispersion is generated. form a natural phenomenon. This is the rainbow.

After the summer rains, the clouds disperse and the sun emerges, and a semicircular rainbow appears in the sky opposite the sun.

Because rainbows also love summer ......

After the summer rains, a semicircular rainbow often appears in the sky. It is caused by the reflection and refraction of sunlight into water droplets in the air.

We know that when sunlight passes through a 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, or the air is filled with countless small water droplets that can deflect the sunlight, 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 right, it becomes the rainbow we see.

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

Comparatively speaking, the air is dry in winter, there is less chance of rain, and most of it is snowfall, and snowfall does not form rainbows, so rainbows are unlikely to appear in winter. However, in rare cases, rainbows can occur when there are the right conditions in the sky for the formation of rainbows.

Because there will be a lot of small water droplets in the sky after the rain in summer, these small water droplets produce the refraction of light, and a rainbow will appear.

This is an optical phenomenon in which small water droplets are reflected to refract different colors of light.

Hello, dear <>

The sky after the rain is raindropped, and when the sun shines through the raindrops, a rainbow is formed. The reflection and refraction of light as it passes through water droplets is something we learned in junior high school physics class. And when light rays are refracted and radiated, the direction of the light changes changes.

As light reflects off the water droplets, the water droplets bounce back in the opposite direction. When light is refracted to form a different direction loop. This reflected and refracted light is intricately intertwined, forming some curved light, which is arched as we see it with the naked eye.

The rainbow is an optical phenomenon in nature. When the sunlight hits the air in the positive air, the small water droplets are refracted and reflected by the light, forming an arched colored ring in the sky, and this is the rainbow.

Hello dear, I am glad to answer <> for you

The appearance of a rainbow after rain is a natural phenomenon formed due to the refraction, reflection, and scattering of rain in the air. When sunlight shines on raindrops in the air, the raindrops refract and reflect the sunlight multiple times, then scattering the light. Different colors of light are refracted and reflected at different angles in raindrops, causing the wavelengths of light to separate, resulting in a spectrum of seven different colors.

These different colors of light are refracted and reflected again after leaving the raindrops, forming a colored arc of light bands, known as rainbows. Rainbows are usually semicircular in shape because the water droplets that roll in the air are scattered in space in a spherical shape, whereas the occurrence of a rainbow requires light from the sun or other light sources to enter and reflect at a specific angle. As a result, only the upper part of the arc can be seen on the ground, while the lower half is hidden below the horizon.

In general, the appearance of a rainbow requires at least three conditions: sunlight exposure, water droplets in the air, and the angle of sight. Therefore, the appearance of a rainbow after the rain can be vividly said as "Seeing the rainbow after the rain, the weather turns clear, and the rainbow still belongs to those who are brave enough to find the sun." ”。