作者toroandme (最爱TORO)
看板Physics
标题[题目] 光电效应
时间Mon Oct 10 23:51:52 2011
这题看起来观念不难但我却卡了...
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
请帮忙指点迷津>.<
谢谢~~
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◆ From: 111.248.76.128
※ 编辑: toroandme 来自: 111.248.76.128 (10/10 23:52)
1F：→ yeahbo:1.0uW/cm^2 * 1.0cm^2 * (1-96%) * 3.0% = 1.2nW/cm^2 10/11 00:09
2F：推 KnifeWang:楼上!差了10倍耶 10/11 00:14
3F：→ toroandme:原来是英文意思没搞懂 谢谢~~~ 10/11 00:16
4F：→ toroandme:那剩的子题就有办法继续做了~ 10/11 00:18
5F：推 KnifeWang:原来是我搞混了 10/11 00:27
6F：→ tcs1031:一楼应该不用乘面积吧@@? 10/11 01:08