Re: [光学] spectrum

楼主: metastable (清士)   2013-05-10 18:44:59
※ 引述《winnerken (ken)》之铭言:
: The mercury spectrum has a green line at 546nm,and an ultraviolet
: line at 365nm. what is the first order angular separation between
: the two spectral lines obtained with a diffraction grating with
: 10000 rulings/cm ?
: 不太清楚这题要问什么? 是光学的题目 还是近物?
根据光栅工式或(单缝公式)
bsinθ=(2k+1)λ/2
题目是要找两个光各自在屏上做第一级暗纹的夹角
代K=0 λ=546nm 跟 365nm
10000 rulings/cm 要换成 b = 10^(-6)
↑指这个光栅每公分有10000条狭缝
把它倒数后 再换成公尺
arcsin 0.273 - arcsin 0.815 就是答案了
有错请指教
作者: winnerken (ken)   2013-05-11 01:39:00
感谢!还是问一下 10000 rulings/cm 是...
楼主: metastable (清士)   2013-05-12 18:43:00
就是光栅的b常数我的单位填错了 应该是10^(-6)

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