What's the difference between sunset and dusk?

1, the sunset glow refers to the colorful rosy 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. When sunlight enters the atmosphere, it will scatter 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.

2. Dusk, a Chinese word, refers to the time after sunset until it is not completely dark. The second finger is yellow and the light color is dark.

Extended data:

Formation principle of sunset glow:

The formation of sunset glow is due to the scattering of light by air. When sunlight enters the atmosphere, it will scatter 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.

Baidu encyclopedia _ sunset

Baidu encyclopedia _ dusk