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目前多数教科书在介绍双光束干涉现象时,都结合杨氏装置来进行讨论。虽然从原理的阐述上能概括有关的内容,但它不能演示全部的现象。为了使这部分内容的讲解与现象的演示有机地结合起来,我们制作了两种双面镜干涉实验装置,该装置既可用于课堂演示又可作为学生课后的自学实验。一、固定角度的双面镜的制作双面镜通常采用过期的废光谱感光板磨成的毛玻璃制成。它有两个特点:第一,光谱感光板比较平滑,而普通玻璃板波浪起伏,容易产生多个错开的虚像,第二,磨成毛玻璃的感光板只能在光滑面上产生一个虚象,便于实验现象的观察。光谱感光板长、宽约为238mm×88mm,用
At present, most textbooks introduce the dual-beam interference phenomenon when they are combined with Young’s device to discuss. Although the principle can be summarized on the relevant content, but it can not demonstrate all the phenomena. In order to combine the presentation of this part with the demonstration of phenomena, we have made two kinds of double-mirror interference experiment devices, which can be used in classroom demonstration as well as students’ self-study after class. First, the fixed point of the double-sided mirror production Double-sided mirror is usually used out of date waste light spectrum plate made of frosted glass. It has two characteristics: First, the spectral plate is relatively smooth, while the ordinary glass plate undulating, prone to produce a number of staggered virtual image, and second, ground into a ground glass plate can only produce a virtual surface smooth, Easy to observe the phenomenon of the experiment. Spectral light plate length, width of 238mm × 88mm, with