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[主观题]

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、7.4X106 m/s

C、6.5X105 m/s

D、9.2X108 m/s

提问人:网友lxjssyh 发布时间:2022-01-07
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