作者toroandme (最愛TORO)
看板Physics
標題[題目] 光電效應
時間Mon Oct 10 23:51:52 2011
這題看起來觀念不難但我卻卡了...
Suppose that light of total intensity 1.0uW/cm^2 falls on a clean iron
sample 1.0cm^2 in area. Assume that the iron sample reflects 96% of the
light and that only 3.0% of the absorbed energy lies in the violet region
of the spectrum above the threshold frequency
(a)What intensity is actually available for the photoelectric effect?
ANS: 1.2nW/cm^2
請幫忙指點迷津>.<
謝謝~~
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◆ From: 111.248.76.128
※ 編輯: toroandme 來自: 111.248.76.128 (10/10 23:52)
→ yeahbo:1.0uW/cm^2 * 1.0cm^2 * (1-96%) * 3.0% = 1.2nW/cm^2 10/11 00:09
推 KnifeWang:樓上!差了10倍耶 10/11 00:14
→ toroandme:原來是英文意思沒搞懂 謝謝~~~ 10/11 00:16
→ toroandme:那剩的子題就有辦法繼續做了~ 10/11 00:18
推 KnifeWang:原來是我搞混了 10/11 00:27
→ tcs1031:一樓應該不用乘面積吧@@? 10/11 01:08