本题目来源于试卷: Physics Unit27: Early Quantum Theory and Models of the Atom，类别为 国际高中通用物理
[单选题]
In order for a photon to eject a4ts+4xg jb4okg *n t2kn electron from a metal's surface in the pcn/d fc7w+7 hwhotoelcdn+ wcw7 7/fhectric effect, the photon's
A. frequency must be greater than a certain minimum value.
B. speed must be greater than a certain minimum value.
C. wavelength must be greater than a certain minimum value.
D. momentum must be zero.
参考答案: A
本题详细解析:
暂无
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