题目内容

强度为I的自然光垂直投射到一块理想偏振片上，当偏振片绕光传播方向转动时，通过偏振片的投射光强度：

A. 仍为I，且不随偏振片的转动而改变；
B. 为I/2，且不随偏振片的转动而改变；
C. 最大值为I，最小值为零；
D. 最大值为I/2，最小值为零。

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当自然光以布儒斯特角入射到两种各向同性透明介质的分界面时：

A. 反射光是线偏振光，折射光也是线偏振光；
B. 反射光是线偏振光，折射光是部分线偏振光；
C. 反射光部分是偏振光，折射光是线偏振光；
D. 反射光是部分偏振光，折射光也是部分偏振光。

自然光从空气以60度角入射到折射率为n的介质表面上，反射光是振动面垂直于入射面的线偏振光，则该介质的折射n的值是：

A. 1.732
B. 1.50
C. 1.414
D. 1.33

平面偏振光（光强为I0)通过尼科耳后，出射方向e光强度为I0cos^2θ。

A. 对
B. 错

Directions: Complete the following passage with the words and expressions from Reading 1.On May 13, 2012, Filipaj, a (1)from Yugoslavia, got a bachelor's degree from Columbia University.When his hometown became a killing field in 1992 with civil war, Filipaj (2)_____ to New York and worked as a (3)_ in Columbia University. He overcame all the difficulties he (4) _____ on his way to be the IVY League graduate. The (5)student and worker would go to the class in the morning and work a 2:30-11 p.m. (6)_ before heading home to study. When talking about his hardships, he was (7)_ without the slightest (8)_ and he even cheerfully described (9) with surprised younger students.His (10)_____ is to get a master's degree, even a PhD. He hopes to become a teacher.