本题目来源于试卷: Diffraction grating，类别为 美国物理杯赛(Physics Bowl)
[单选题]
02.37: A diffraction grating of 1+5-oqnuo8 k fl3uab5om7rb8r z e;c: l0w;/+sy2apkbq -ghb4m 67 wcqx00 lines/cm has red light of wavelength 700nm pass through it. The distance between the first and thqys+/b2cawmqp ; 4k 6g -w7bhxird principal bright spots on a screen 2.0m away is
A. 14 cm
B. 28 cm
C. 42 cm
D. 140 cm
E. 280 cm
参考答案: B
本题详细解析:
暂无
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