本题目来源于试卷: Reflection and Refraction,类别为 美国物理杯赛(Physics Bowl)
[单选题]
95.40: A Metrologic laser c q4v4r/ s(ghl is embedded in a mat mr2 vk28)hfn fwpm*m-y 3nyk2erial of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The fkhy)mp2f23nr m8 nk2 m-*v wyvalue of n is:

A. 1.4
B. 1.5
C. 2.1
D. 3.5
E. 5.0
参考答案: B
本题详细解析:
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