当用基于数值盘算的电磁仿实软件降取了单缝的自导缴；

Extracted the self-admittance of single slot by using the electromagnetic simulation software based on numerical calculation;

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利用光敏三极管代替硅光电池和光敏二极管来测试单缝和双缝衍射的光强分布。

This paper introduces a new method to measure the intensity distribution of single seam diffraction by replacing the silicon photocell and light activated diode with light activated triode.

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该方法简单、直观，充分体现了惠更斯-菲涅耳原理的物理思想，有助于更好地认识和理解单缝夫琅和费衍射的实质。

The way is simple and visual, the physical thinking of Huygens-Fresnel principle is incarnated fully, it helps to understand the quiddity of single slit Fraunhofer diffraction .

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