Why is the sunset before the typhoon beautiful? What are the reasons for the color formation of sunrise and sunset?

Why is the sunset before the typhoon beautiful?

The sunset before the wind is beautiful because the light and shadow in the sky before the typhoon are unpredictable, and the scenery will have many unexpected color effects under the action of light. Sunset refers to colorful clouds appearing on the horizon around sunset in the evening. There are often colorful clouds in the morning and evening, before and after sunrise and sunset. The formation of morning light and sunset glow is due to the scattering of light by air. Sunlight enters the atmosphere and scatters when it meets atmospheric molecules and particles suspended in the atmosphere. These atmospheric molecules and particles themselves do not emit light, but because they scatter sunlight, and each atmospheric molecule forms a scattered light source.

? Causes of the formation of sunrise and sunset colors

Sunlight is divided into ultraviolet rays (5%), infrared rays (43%) and visible light (52%). There are many colors in summer because sunlight is scattered into monochromatic light through clouds, dust and water vapor, which is equivalent to the role of a prism.

"Red, orange, yellow, green, blue, indigo and purple" are arranged according to the wavelength from long to short. Red light has the longest wavelength and the longest penetration distance. Automobile taillights are designed as red lights according to this principle. Better as a warning. "Red, orange and yellow" tricolor light with longer wavelength has less loss and longer penetration distance in the scattering process, forming the main color in summer.

? Typhoon safety precautions

Indoor: Strong wind will blow down high-altitude objects, easily causing casualties. Therefore, before the typhoon strikes, it is necessary to fix the scattered items such as flower pots, outdoor units of air conditioners and awnings to ensure safety. Check whether the doors and windows are closed and loose. If possible, put a cross pin behind the door and window. In addition, don't move near the windward window and don't take valuables away from the windward window. Typhoon may lead to water and electricity cuts, so we should make timely preparations for our daily life. Check wiring, prepare flashlights and candles, and reserve drinking water to prevent power failure and water supply; Prepare food and vegetables for more than a day or two, and don't go out unless necessary.

Outdoor: Try not to go out when it is windy. Be sure to go out, wear eye-catching clothes, bend down and walk slowly, try to grasp fixed objects such as railings, and bend down and walk slowly when crossing the bridge or walking high; When walking in the street, pay special attention to objects falling from a height. Do not take shelter from the wind and rain in dangerous houses, shacks, temporary buildings, scaffolding, telephone poles, trees, billboards, iron towers and other places where casualties are likely to occur. At the same time, stay away from iron towers, transformers, metal sheds, etc. You shouldn't stay under the tree or near the tracks either. If you see the ground wire after the typhoon, please stay away. You can post warning signs first, and then call the power hotline for warranty.