如图一透明半圆柱体折射率为半径为r长为l一平行光束从半圆柱体的矩形表面垂直射入从部分柱面有光线射出球该部分柱面的面积s——青夏 Template




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tomski如图一透明半圆柱体折射率为半径为r长为l一平行光束从半圆柱体的矩形表面垂直射入从部分柱面有光线射出球该部分柱面的面积s——青夏 coloring