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範例:光電效應的原理

今已知要使一鉀材料產生光電效應的最長波長為564×10-9公尺(1)試求鉀材料的功函數 (2)如以400×10-9公尺的光照射此材料,則其截止電壓應為若干?已知1.6×10-19焦耳為一電子伏特,而一電子伏特的意義,乃係一個電子在1伏特的電位差中,被加速所獲得的能量。


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