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出自维基百科,自由个百科全书

,又称影子、阴影(英语:shadow)是一种物理现象,是光线被弗透明物体阻档而产生个黑暗范围,搭光源个方向相反。影个横截面是二维轮廓、阻档光线物体个倒转投影。影个大小、形状随光线个入射角而改变。

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