本题目来源于试卷: Photoelectric Effect，类别为 美国物理杯赛(Physics Bowl)
[单选题]
06.46: In the photoelectje i+9epg4y o 16i(,y:lzo kwpric effect expery;-ziy7zk 5 )d5janmcn+si /jiment, a stopping potential of V_{stop}$ is needed when light of frequency $f_0$ shines on the electron-emitting metal surface. If the metal surface on which the light shines is replaced with a new material that has half the work function, what is the new stopping potential ???????????????? , for light of frequency $f_0$ shining on it?
A. $V_{new}\:>2V_{stop}$
B. $V_{new}\:=2V_{stop}$
C. $V_{stop}<V_{new}\:<2V_{stop}$
D. $V_{new}\:=V_{stop}$
E. It is indeterminate with the given information
参考答案: E
本题详细解析:
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