本题目来源于试卷: Motion of charged particle and Velocity selector and Mass spectrometer，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.25: The speed of electrically charged beta par(ue9jjn -ln( s+1s ezlticles is commonly determvy6; t;vztcyn5v .5 qmined byq. 65tntvc v;vmz5; yy
A. observing their behavior in a Millikan oil-drop apparatus.
B. measuring their deflection in a gravitational field.
C. measuring the half-life of the emitting nucleus.
D. measuring their deflection in a known magnetic field.
E. using Elihu Thomson apparatus.
参考答案: D
本题详细解析:
暂无
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