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 particles is sckqyf 7c bg./*om0 1lcommon8g*j: ovsx 7awly determined byo8xaw:7sgj v *
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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