作者whaleswin16 (游击队长)
站内NTU-Exam
标题[试题] 97下 陈逸聪 物理化学下 第七次小考
时间Sat Jun 13 20:23:20 2009
课程名称︰物理化学下
课程性质︰必修
课程教师︰陈逸聪
开课学院:理学院
开课系所︰农业化学系(化学系开课)
考试日期(年月日)︰2009年6月9日
考试时限(分钟):10 min
是否需发放奖励金:是
(如未明确表示,则不予发放)
试题 :
计算题: (15分)
(1) The energy required to remove an electron from K metal (called the
work function) is 2.2eV (where 1eV = 1.602*10^-19J), whereas that
of Ni is 5.0eV. A beam of light impinges on a clean surface of the
two metals. Calculate the threshole frequencies and wavelengths of
light required to emit photoelectrons from the two metals. (5%)
(2) Will violet light of wavelength 400 nm cause ejection of electrons
in K? In Ni? (5%)
(3) Calculate the maximum kinetic energy of electrons emmited in part
(b). (5%)
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