Halo-Nature's Weather Forecast

Halo-Nature's Weather Forecast Chart

The blue sky is covered with a silky cloud curtain. Soon, a colorful halo appeared around the sun. It is like a rainbow, but not as bright as a rainbow; The color arrangement of the rainbow is inner ultraviolet red, while the halo is just the opposite, which is outer ultraviolet red. This is the "halo", commonly known as the "wind circle".

(2) Our ancestors observed and recorded the "halo" very early. As far away as Oracle Bone Inscriptions in Yin Ruins, the word "dizzy" has already appeared. In the Western Zhou Dynasty, "halo" was officially recorded as a celestial phenomenon. Europeans didn't have a detailed record of "halo" until 1630, which was later than our country 1000 years ago.

(3) Although people have noticed this beautiful light image for a long time, it has been nearly a century or two to make a scientific explanation of its causes. 1666, Newton made a very simple experiment, but it had a great influence on the later scientific development. He let a beam of sunlight pass through the prism, and the prism turned red. Seven stripes of orange, yellow, green, blue, indigo and purple. This made people realize for the first time that sunlight was originally composed of seven different colors of light. When they pass through the prism, due to the wavelength. Different refraction angles show their true colors. The interaction between the left and right laid the foundation for the scientific explanation of "halo". (4) The radiosonde data show that the silky white cloud curtain is over 5000 meters above the ground and consists of hexagonal cylindrical small ice crystals. If a hexagonal cylinder is not adjacent to each other, it is actually a triangular prism. Therefore, hexagonal cylindrical ice crystals can divide sunlight into seven color bars like prisms. When countless trillions of small ice crystals are irradiated by sunlight, all kinds of light are refracted at a certain angle to form a colorful love ring.

(5) People are interested in "halo" not only because it has the color of blue dots, but also because it is a precursor of weather changes. According to the statistics of Altay, China, there were 1052 "halos" in 1980, and the wind appeared two days after the "halos". Major weather changes such as rainfall account for 80%.

(6) However, not all "auras" are signs of storms. After long-term observation, meteorologists found that when the duration of "halo" is within 1 hour (commonly known as "short halo"), there will be wind or rain from 12 hour to 36 hours in the future; When the "halo" lasts for more than 5 hours (commonly known as "long halo"), there will be no stormy weather.

(7) Beautiful love circle is the weather forecast map of nature. Knowing and using it to observe the situation can better arrange our work and life.

1. Paragraph (1) explains the difference between halo and rainbow in what two ways? (Each answer shall not exceed 5 words) Answer: (1) □□□□□□□□ (2) □□□□□□□□□ 2. The word "they" in paragraph (3) is _ _ _ 3. "This discovery" in paragraph (3) refers to (a). They only show their true colors. 4. The following is the understanding of paragraph (4). Correct: (a) Halo is formed by the reflection of light through air in the sky. B. Halo is formed by sunlight reflecting through air. C. Halo is formed by refraction of light through ice crystals in clouds. 5. Paragraph (5) takes Altay, Xinjiang as an example.

Answer: Halo-Nature's Weather Forecast Map: 1. (1) brightness (2) color arrangement 2. Each 3.c4.d5.b