Sunset: refers to the evening sun; Also refers to the west side of the mountain; It is also used to describe old age. Sunset is usually orange-red because it is close to dusk.
Sunset: Sunset refers to the colorful clouds that appear on the horizon around sunset in the evening. The formation of sunset glow is due to the scattering of light by air.
2. Different sources
Sunset: Li Shangyin's "Leyou Tombs": "to see the sun, for all his glory, buried by the coming night."
Vernacular Interpretation: buried by the coming night, the good times are short after all. It's really beautiful. It's a pity that it's near dusk, and it's going to be wiped out soon.
Sunset: Fu "Six Chapters of a Floating Life: Qugui Record": "There is no smoke, and the sunset glow is brilliant."
Interpretation of vernacular: The smoke from cooking in the house rises slowly, and the sunset glow on the horizon radiates brilliant light.
3, the phenomenon is different
Sunset: Sunset is a special phenomenon formed at sunset. The sun is lying quietly on the western horizon, becoming so big and the color is so deep yellow and deep red. It descends slowly, contracting and flattening as it approaches the horizon.
Sunset: 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, each atmospheric molecule forms a scattered light source.
According to Rayleigh scattering law, light with shorter wavelength such as violet, blue and cyan in the solar spectrum is most easily scattered, while light with longer wavelength such as red, orange and yellow has stronger light transmission ability.
So we see that the clear sky is always blue, while the light above the horizon is only yellow, orange and red with longer wavelengths. After these rays are scattered by impurities such as air molecules and water vapor, the sky there will be colorful.
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