有一截面为等腰三角形的玻璃棱镜它的顶角a为30°光线垂直于ab面射入如图所示从ac面射出若出射光线与入射光线之间的夹角为30°则此 Sketch Coloring Page

有一截面为等腰三角形的玻璃棱镜它的顶角a为30°光线垂直于ab面射入如图所示从ac面射出若出射光线与入射光线之间的夹角为30°则此 Template

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tomski有一截面为等腰三角形的玻璃棱镜它的顶角a为30°光线垂直于ab面射入如图所示从ac面射出若出射光线与入射光线之间的夹角为30°则此 coloring

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