半径为r的玻璃半圆柱体横截面如图所示圆心为o一束单色红光沿截面射�圆柱面方�与底面垂直ao为与底面垂直的半径光线的入射点为b∠ Template




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tomski半径为r的玻璃半圆柱体横截面如图所示圆心为o一束单色红光沿截面射�圆柱面方�与底面垂直ao为与底面垂直的半径光线的入射点为b∠ coloring