题目内容
德布罗意认为:任何一个运动着的物体,都有一种波与它对应,波长是
,式中p是运动物体的动量,h是普朗克常量。已知某种紫光的波长是440nm,若将电子加速,使它的德布罗意波长是这种紫光波长的
倍。求:
(1)电子的动量的大小。
(1)试推导加速电压跟德布罗意波波长的关系,并计算加速电压的大小。电子质量
,电子电量
,普朗克常量
,加速电压的计算结果取一位有效数字。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357217414.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357233246.gif)
(1)电子的动量的大小。
(1)试推导加速电压跟德布罗意波波长的关系,并计算加速电压的大小。电子质量
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357233571.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357249522.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357280567.gif)
(1)
(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357295888.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357280604.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357295888.gif)
(1)
电子的动量![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241153573271131.gif)
(2)电子在电场中加速,有![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357342508.gif)
加速电压![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357295888.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357311426.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241153573271131.gif)
(2)电子在电场中加速,有
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357342508.gif)
加速电压
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115357295888.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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