Why can the sky present the different color

Sun's white colored light actually is red, the orange, yellow, green,blue, ?, purple and so on a series of has the color the light wavecomposition. These colors light wave lengths are dissimilar, red lightwave longest, the orange light wave next, the purple light wave isshortest. In the air member and the air is drifting the innumerabletiny dusts and the waterdrop, they all can disperse sun's assortedlight, this is called the scattering phenomenon. In sunlight lightwave wave length shorter, like the purple, the blue colored light veryeasily is scattered; Wave length longer, likes, the orange coloredlight red is not easy to scatter. Morning or the evening, the sunlightis an oblique incidence, it through ??? the distance quite islong, receives the scattering to weaken very much fiercely. Weakensmany is the purple colored light, weakens least is red or the orangecolored light. These weaken after the colored sunlight, shines in thesky, the cloud layer, forms the dazzling pink clouds.

Each kind of cloud body thickness difference very big, thick mayamount to 78 kilometers, is thin only has several dozens meters. HasMan Bu entire day the layered cloud, the isolation dispersing placeproduct shape cloud, as well as billow cloud and so on many kinds.Very thick layered cloud, or when thunderstorm jams the sky ???,solar and moon's light is very difficult to shine through, the cloudbody looks like very black; The slightly meager layered cloud and thebillow cloud, look like is pessimistic, the billow cloud, ?? theedge partial colors are specially more grayish white; But the verythin cloud, the light is easy to penetrate, specially the thin cloudwhich is composed by the ice crystal, the cloud silk appears under thesunlight specially brightly, has the filiform gloss. The space even ifhas this kind of layered cloud, the ground object still could screenthe shadow under sun's and the month bright. Sometimes this kind ofice crystal composition cloud layer is thin nearly cannot look, but solong as discovered has or several big corona nearby the livelihood,still was allowed to conclude had the cloud, this kind of cloud wascalled "the thin curtain ???".