干涉和衍射是波特有的性质,是高中物理课程中“机械波”和“光的波动性”中的重点内容.正确理解和掌握干涉、衍射的现象和性质是学好这两部分知识的关键,而做好水波的干涉、衍射实验,对理解和掌握干涉、衍射的性质将会起到事半功倍的效果.在本校不具备水波槽实验仪器的情况下,我在教学过程中重新设计了人教版高中《物理》第二册(必修加选修)的第54面和56面的实验装置,用简易材料组装仪器进行教学,效果较好.一、实验材料的准备 Interference and diffraction are bourgeois and are the key points in the “Mechanical Wave” and “Light Volatility” in high school physics curricula. Correct understanding and grasping of the phenomenon and nature of interference and diffraction are two parts Knowledge of the key, and good water wave interference, diffraction experiments, to understand and grasp the interference, the nature of diffraction will play a multiplier effect in the school does not have the water tank experimental instruments, I re-design in the teaching process PEP teaching high school “Physics” Volume II (compulsory and optional) of the 54th and 56th of the experimental device, with simple materials assembly equipment for teaching, the effect is better. First, the preparation of experimental materials