| CD上没有光线射出的最左端点到D的距离(已有1个解答) |
| 如图所示,折射率为n=2的玻璃主体置于空气中；其为R。一束平行光平行于横截面是半为R的半圆形ABP和矩形ABCD组成，P为最高点，O为圆心，AD距离为R.一束平行光平行于横截面，与水平=60⁰入射照射到半圆面上，AD表面涂黑，不考虑PBC上的反射，求； |
发问:tianwancheng 时间:2016-5-11 21:59:53 |
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解答： 时间：2020-11-21 3:22:42 |
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