The work function for the photoelectric effect in potassium is 2.25 eV.For the case when light with a wavelength of 3.6 x 10-7 ；m falls on the potassium， the velocity of the fastest of the emitted electrons is（）
The work function for the photoelectric effect in potassium is 2.25 eV.For the case when light with a wavelength of 3.6 x 10-7 ；m falls on the potassium， the velocity of the fastest of the emitted electrons is（）
A.2.3X103； m/s
B.9.2X108 m/s
C.7.4X106； m/s
D.6.5X105； m/s
参考答案：
6.5X105； m/s
2023-06-16
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