题目内容
频率为ν的光照射某金属时,产生光电子的最大初动能为Ekm.改用频率为2ν的光照射同一金属,所产生光电子的最大初动能为(h为普朗克常量):
A.Ekm-hν | B.2Ekm | C. Ekm+hν | D. Ekm+2hν |
C
试题分析:根据光电效应方程
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174308226816.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174308444820.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174308647362.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241743088651057.png)
故选C.
点评:关键是掌握光电效应方程
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824174308226816.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目
题目内容
A.Ekm-hν | B.2Ekm | C. Ekm+hν | D. Ekm+2hν |