本题目来源于试卷: Physics Unit24: Wave Nature of Light，类别为 通用国际物理
[单选题]
On a clear day, the sky appears to ;)tlx 04yyuqk be more blue toward the zenith z9zqcjml0li g5 tp;15r:cp ;k(overhead) than it d ;j9cz5 i1p;:ctl5 0 gprmzqkloes toward the horizon. This occurs because
A. the atmosphere is denser higher up than it is at the Earth's surface.
B. the temperature of the upper atmosphere is higher than it is at the Earth's surface.
C. the sunlight travels over a longer path at the horizon, resulting in more scattering.
D. none of the given answers
参考答案: C
本题详细解析:
暂无
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