I think it is more difficult to see in the city. After all, the vegetation around the city is relatively sparse, so rainy days are generally rainy days, sunny days are sunny days, or when the sun escapes from the dark clouds, it no longer rains. So I think it is more difficult to see in cities.
In our mountainous area, because of the lush vegetation, the weather forecast is often inaccurate during this season. It is normal for sunny days to rain. Today it rained three times in one day. There were three rainbows, and once there were two in a row.
and the two distances are relatively close. It's just that the pixels of my mobile phone are not very good, so I can only take a relatively obvious picture. And it looks lighter when photographed. Does anyone know how to take a rainbow photo? Can you tell me? I searched on a certain video, but it was all fake. I thought I was following his steps step by step. Otherwise, the result would be a whiteboard or a black screen, so why not use the original camera?
And I was asked a rather embarrassing question by someone today. He said how the rainbow was produced. I said it was refraction of light, and he asked how it was refracted. I was confused at first. I just know how he came to be. I just know a rough idea, but how do I know the details? I would like to ask the majority of netizens, if you don’t use Baidu, do you know how to refract it?
I bet most people only know about refraction, but don't know how to refract.
Let me tell you how the rainbow is formed.
1. A rainbow is caused by sunlight hitting small, nearly round water droplets in the air, causing dispersion and reflection.
2. When sunlight hits a water droplet, it will be incident at different angles, and will also be reflected at different angles within the water droplet. Among them, the reflection at 40 to 42 degrees is the strongest.
3. When this kind of reflection is caused, the sunlight enters the water droplet and is refracted once, then reflects on the back of the water droplet, and then refracts again when it leaves the water droplet.
4. Water has a dispersion effect on light. The refraction angle of blue light is larger than that of red light. The spectrum seen by the observer is inverted, with red light on top.
So next time someone asks you, can you say it? It is probably most people’s daily routine to forget about it after seeing it.
I understand everyone. How long has it been since you have seen a rainbow in real life? Do you want to see it? If you don't come to our place, you can see them every day, but there is really no shortage of them this season.
