居家DIY光栅衍射系列实验

A SERIES OF HOME DIY GRATING DIFFRACTION EXPERIMENTS

新型冠状病毒防控给大学物理实验教学带来了新的挑战和机遇。教师线上教学,学生居家自主实验正成为这一特殊时期的实验教学的新特色。本文主要介绍“居家DIY光栅衍射系列实验”。以激光笔为光源,利用常见的钢尺、丝网、光盘和液晶屏作为材料,实现了一维/二维和透射/反射四种条件的光栅衍射。本系列实验通过生活中常见的简单器材,可以观察到丰富的光栅衍射现象并进行精度较高的测量,使学生在感受创造条件进行实验乐趣的同时加深对衍射的理解。因此光栅衍射系列实验非常适合作为居家和线下实验内容。

The novel coronavirus(COVID-19)control and prevention brings new challenges and opportunities to college physics experiment teaching.Online teaching by teachers and home-based experiments by students are the new characteristics of experimental teaching in this special period.This paper mainly introduces a series of home DIY grating diffraction experiments.Using a laser pen as the light source,and using a steel ruler,CD and LCD screen as the grating materials,the transmission and reflection grating diffraction in one-dimensional or two-dimensional can be realized.By using common and simple equipment commonly used in daily life,one can observe a wealth of grating diffraction phenomenon and do measurement with considerable accuracy,and accordingly,students can not only fully feel the fun of searching and collecting handy parts for non-lab experiments and but deepen the understanding of diffraction.Therefore,grating diffraction series experiments are very suitable for home and offline experiments.