[問題] 98物理指考一題
※ [本文轉錄自 SENIORHIGH 看板 #1DrHtSIL ]
作者: jacky77880 (D.Achilles) 看板: SENIORHIGH
標題: [問題] 98物理指考一題
時間: Thu May 19 21:40:41 2011
http://ppt.cc/JSX1
想請問第19題,因為對光電效應不是很熟,今天卡在這邊卡滿久的= =
看了三本講義幾乎都是同一種解法,所以想問問看這題怎麼解,
我目前只知道題目給的3.2mA代表有2x10^16個光電子
而題幹所給的入射光一個光子的能量是5x10^-19J
但接下來所有的講義都是把功率除以上面的數值然後說代表入射的光子數,
這裡就看不懂了,我檢查單位是1/S,而且它除以的不是光子的能量嗎??
為什麼會代表光電子的數目- -
麻煩知道的大大解答一下!!
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