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[audioFiles]2017m5x/audio_ezfj_014_170517[/audioFiles] The Color of Snow

游客2024-09-14  34
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答案     The Color of Snow
    Generally, the color of snow appears white. / This is because the light we see from the sun is white. / Most natural materials take in some sunlight / This gives them their color. / However, when light travels from air to snow, some light is sent back, or reflected / Snow crystals have many surfaces to reflect sunlight / Yet the snow does take in a little sunlight. / It is this light that gives snow its white appearance. /
    Sometimes, snow may appear to be blue. / The blue light is the product of a long travel path through the snow. /
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